Provided by: mutt_1.10.1-2_amd64 bug

NAME

       muttrc - Configuration file for the Mutt Mail User Agent

DESCRIPTION

       A  mutt  configuration file consists of a series of “commands”.  Each line of the file may
       contain one or more commands.  When multiple commands are used, they must be separated  by
       a semicolon (“;”).

       The  hash  mark,  or pound sign (“#”), is used as a “comment” character. You can use it to
       annotate your initialization file. All text after the comment character to the end of  the
       line is ignored.

       Single  quotes  (“'”)  and  double quotes (“"”) can be used to quote strings which contain
       spaces or other special characters.  The difference between the two  types  of  quotes  is
       similar  to  that  of  many  popular shell programs, namely that a single quote is used to
       specify a literal string (one that is not interpreted for shell variables or quoting  with
       a  backslash  [see next paragraph]), while double quotes indicate a string which should be
       evaluated.  For example, backticks are evaluated inside of double quotes, but  not  single
       quotes.

       \ quotes the next character, just as in shells such as bash and zsh.  For example, if want
       to put quotes (“"”) inside of a string, you can use “\” to force the next character to  be
       a literal instead of interpreted character.

       “\\”  means  to  insert  a  literal  “\”  into the line.  “\n” and “\r” have their usual C
       meanings of linefeed and carriage-return, respectively.

       A “\” at the end of a line can be used to split commands  over  multiple  lines,  provided
       that the split points don't appear in the middle of command names.

       It  is also possible to substitute the output of a Unix command in an initialization file.
       This is accomplished by enclosing the command in backticks (`command`).

       UNIX environment variables can be accessed like the way it is done in shells like  sh  and
       bash: Prepend the name of the variable by a dollar (“$”) sign.

COMMANDS

       alias [-group name [...]] key address [, address [ ... ]]
       unalias [ *  | key ]

              alias  defines  an alias key for the given addresses. Each address will be resolved
              into either an email address (user@example.com) or a named email address (User Name
              <user@example.com>).  The  address  may  be  specified  in either format, or in the
              format “user@example.com (User Name)”.  unalias removes the alias corresponding  to
              the  given  key or all aliases when “*” is used as an argument. The optional -group
              argument to alias causes the aliased address(es) to be added to the named group.

       group [-group name] [-rx EXPR [ ... ]] [-addr address [ ... ]]
       ungroup [-group name ] [ * | [[-rx EXPR [ ... ]] [-addr address [ ... ]]]

              group is used to directly add  either  addresses  or  regular  expressions  to  the
              specified  group  or  groups.  The  different  categories of arguments to the group
              command can be in any order. The flags -rx and -addr  specify  what  the  following
              strings  (that  cannot  begin  with  a  hyphen)  should be interpreted as: either a
              regular expression or an email address, respectively.  ungroup is  used  to  remove
              addresses  or regular expressions from the specified group or groups. The syntax is
              similar to the group command, however the special character * can be used to  empty
              a group of all of its contents.

              These  address groups can also be created implicitly by the alias, lists, subscribe
              and alternates commands by specifying the optional -group option.

              Once defined, these address groups can be used in patterns to search for and  limit
              the display to messages matching a group.

       alternates [-group name] regexp [ regexp [ ... ]]
       unalternates [ *  | regexp [ regexp [ ... ]] ]

              alternates is used to inform mutt about alternate addresses where you receive mail;
              you can use regular expressions  to  specify  alternate  addresses.   This  affects
              mutt's  idea  about messages from you, and messages addressed to you.  unalternates
              removes a regular expression from the list of known  alternates.  The  -group  flag
              causes all of the subsequent regular expressions to be added to the named group.

       alternative_order type[/subtype] [ ... ]
       unalternative_order [ *  | type/subtype] [...]

              alternative_order  command  permits  you  to define an order of preference which is
              used by mutt to determine which part of a multipart/alternative body to display.  A
              subtype of “*” matches any subtype, as does an empty subtype.   unalternative_order
              removes entries from the ordered list or deletes the entire list when “*”  is  used
              as an argument.

       auto_view type[/subtype] [ ... ]
       unauto_view type[/subtype] [ ... ]

              This  commands  permits  you  to specify that mutt should automatically convert the
              given MIME types to text/plain when displaying messages.  For this to  work,  there
              must be a mailcap(5) entry for the given MIME type with the copiousoutput flag set.
              A subtype of “*” matches any subtype, as does an empty subtype.

       mime_lookup type[/subtype] [ ... ]
       unmime_lookup type[/subtype] [ ... ]

              This command permits you to define a list of "data" MIME content  types  for  which
              mutt  will  try to determine the actual file type from the file name, and not use a
              mailcap(5) entry given for the original MIME type.  For instance, you may  add  the
              application/octet-stream MIME type to this list.

       bind map1,map2,... key function
              This  command  binds the given key for the given map or maps to the given function.
              Multiple maps may be specified by separating them with  commas  (no  whitespace  is
              allowed).

              Valid  maps  are:  generic,  alias, attach, browser, editor, index, compose, pager,
              pgp, postpone, mix.

              For more information on keys and functions, please consult the  Mutt  Manual.  Note
              that the function name is to be specified without angle brackets.

       account-hook [!]regexp command
              This  hook  is  executed  whenever  you  access  a remote mailbox. Useful to adjust
              configuration settings to different IMAP or POP servers.

       charset-hook alias charset
              This command defines an alias for a character set.   This  is  useful  to  properly
              display messages which are tagged with a character set name not known to mutt.

       iconv-hook charset local-charset
              This  command  defines  a system-specific name for a character set.  This is useful
              when your system's iconv(3) implementation does not understand MIME  character  set
              names  (such  as iso-8859-1), but instead insists on being fed with implementation-
              specific character set names (such as 8859-1).  In this specific  case,  you'd  put
              this into your configuration file:

              iconv-hook iso-8859-1 8859-1

       message-hook [!]pattern command
              Before  mutt  displays  (or  formats  for  replying  or forwarding) a message which
              matches the given pattern (or, when it is preceded by an exclamation mark, does not
              match  the  pattern),  the  given command is executed.  When multiple message-hooks
              match, they are  executed  in  the order in which they occur in  the  configuration
              file.

       folder-hook [!]regexp command
              When  mutt  enters a folder which matches regexp (or, when regexp is preceded by an
              exclamation mark, does not match regexp), the given command is executed.

              When several folder-hooks match a given mail folder, they are executed in the order
              given in the configuration file.

       macro map key sequence [ description ]
              This  command binds the given sequence of keys to the given key in the given map or
              maps.  For valid maps, see bind. To specify multiple maps, put only a comma between
              the maps.

       color object foreground background [ regexp ]
       color index foreground background [ pattern ]
       uncolor index pattern [ pattern ... ]

              If   your   terminal   supports  color,  these  commands  can  be  used  to  assign
              foreground/background  combinations  to  certain  objects.   Valid   objects   are:
              attachment,  body,  bold,  error,  header,  hdrdefault,  index, indicator, markers,
              message, normal, prompt, quoted, quotedN, search, signature, status,  tilde,  tree,
              underline.   If  the  sidebar  is  enabled  the  following  objects are also valid:
              sidebar_divider,     sidebar_flagged,     sidebar_highlight,     sidebar_indicator,
              sidebar_new,  sidebar_spoolfile.  The body and header objects allow you to restrict
              the colorization to a regular expression.  The index object permits you  to  select
              colored messages by pattern.

              Valid  colors  include:  white,  black,  green,  magenta,  blue, cyan, yellow, red,
              default, colorN.

       mono object attribute [ regexp ]
       mono index attribute [ pattern ]

              For terminals which don't  support  color,  you  can  still  assign  attributes  to
              objects.  Valid attributes include: none, bold, underline, reverse, and standout.

       [un]ignore pattern [ pattern ... ]
              The  ignore  command  permits  you to specify header fields which you usually don't
              wish to see.  Any header field whose tag begins with an “ignored” pattern  will  be
              ignored.

              The unignore command permits you to define exceptions from the above mentioned list
              of ignored headers.

       lists [-group name] regexp [ regexp ... ]
       unlists regexp [ regexp ... ]
       subscribe [-group name] regexp [ regexp ... ]
       unsubscribe regexp [ regexp ... ]

              Mutt maintains two lists of mailing list address patterns,  a  list  of  subscribed
              mailing lists, and a list of known mailing lists.  All subscribed mailing lists are
              known.  Patterns use regular expressions.

              The lists command adds a mailing list address to the list of known  mailing  lists.
              The  unlists  command removes a mailing list from the lists of known and subscribed
              mailing lists.  The subscribe command adds a mailing list to the lists of known and
              subscribed  mailing  lists.   The  unsubscribe  command removes it from the list of
              subscribed mailing lists. The -group  flag  adds  all  of  the  subsequent  regular
              expressions to the named group.

       mbox-hook [!]regexp mailbox
              When  mutt  changes  to a mail folder which matches regexp, mailbox will be used as
              the “mbox” folder, i.e., read messages will be moved to that folder when  the  mail
              folder is left.

              The first matching mbox-hook applies.

       mailboxes filename [ filename ... ]
       unmailboxes [ * | filename ... ]

              The  mailboxes  specifies  folders which can receive mail and which will be checked
              for new messages.  When changing folders, pressing space will cycle through folders
              with new mail.  The unmailboxes command is used to remove a file name from the list
              of folders which can receive mail.  If "*" is specified as the file name, the  list
              is emptied.

       my_hdr string
       unmy_hdr field

              Using  my_hdr,  you  can  define  headers  which  will be added to the messages you
              compose.  unmy_hdr will remove the given user-defined headers.

       hdr_order header1 header2 [ ... ]
              With this command, you can specify an order in which mutt will attempt  to  present
              headers to you when viewing messages.

       save-hook [!]pattern filename
              When  a  message  matches pattern, the default file name when saving it will be the
              given filename.

       fcc-hook [!]pattern filename
              When an outgoing message matches pattern, the default file name for storing a  copy
              (fcc) will be the given filename.

       fcc-save-hook [!]pattern filename
              This command is an abbreviation for identical fcc-hook and save-hook commands.

       send-hook [!]pattern command
              When  composing  a  message  matching  pattern, command is executed.  When multiple
              send-hooks match, they are executed in  the  order  in  which  they  occur  in  the
              configuration file.

       send2-hook [!]pattern command
              Whenever  a  message  matching pattern is changed (either by editing it or by using
              the compose menu), command is executed. When multiple send2-hooks match,  they  are
              executed  in  the  order  in  which they occur in the configuration file.  Possible
              applications include setting the $sendmail variable when a message's from header is
              changed.

              send2-hook  execution  is  not  triggered  by use of enter-command from the compose
              menu.

       reply-hook [!]pattern command
              When replying to a message matching pattern, command is  executed.   When  multiple
              reply-hooks  match,  they  are  executed  in  the  order in which they occur in the
              configuration file, but all reply-hooks are matched and executed before send-hooks,
              regardless of their order in the configuration file.

       crypt-hook regexp key-id
              The  crypt-hook  command  provides  a method by which you can specify the ID of the
              public key to be used when encrypting messages to a certain recipient.  The meaning
              of  "key  ID"  is  to  be  taken broadly: This can be a different e-mail address, a
              numerical key ID, or even just an arbitrary search string.  You  may  use  multiple
              crypt-hooks  with  the same regexp; multiple matching crypt-hooks result in the use
              of multiple key-ids for a recipient.

       open-hook regexp "command"
       close-hook regexp "command"
       append-hook regexp "command"

              These commands provide a  way  to  handle  compressed  folders.  The  given  regexp
              specifies which folders are taken as compressed (e.g.  "\\.gz$"). The commands tell
              Mutt how to uncompress a folder (open-hook),  compress  a  folder  (close-hook)  or
              append  a  compressed mail to a compressed folder (append-hook). The command string
              is the printf(3) like format string, and it should accept two parameters: %f, which
              is  replaced  with  the (compressed) folder name, and %t which is replaced with the
              name of the temporary folder to which to write.

       push string
              This command adds the named string to the keyboard buffer.

       set [no|inv|&|?]variable[=value] [ ... ]
       toggle variable [ ... ]
       unset variable [ ... ]
       reset variable [ ... ]

              These commands are used to set and manipulate configuration variables.

              Mutt knows four basic types of variables: boolean, number, string  and  quadoption.
              Boolean  variables  can  be set (true), unset (false), or toggled. Number variables
              can be assigned a positive integer value.

              String variables consist of any number of printable characters.   Strings  must  be
              enclosed in quotes if they contain spaces or tabs.  You may also use the “C” escape
              sequences \n and \t for newline and tab, respectively.

              Quadoption variables are used to control whether or not to be prompted for  certain
              actions,  or  to specify a default action.  A value of yes will cause the action to
              be carried  out  automatically  as  if  you  had  answered  yes  to  the  question.
              Similarly,  a value of no will cause the the action to be carried out as if you had
              answered “no.” A value of ask-yes will cause a prompt  with  a  default  answer  of
              “yes” and ask-no will provide a default answer of “no.”

              The  reset command resets all given variables to the compile time defaults.  If you
              reset the special variable all, all variables will  reset  to  their  compile  time
              defaults.

       source filename
              The given file will be evaluated as a configuration file.

       spam pattern format
       nospam pattern

              These  commands  define spam-detection patterns from external spam filters, so that
              mutt can sort, limit, and search  on  ``spam  tags''  or  ``spam  attributes'',  or
              display them in the index. See the Mutt manual for details.

       subjectrx pattern replacement
       unsubjectrx [ * | pattern ]

              subjectrx  specifies  a  regular expression pattern which, if detected in a message
              subject, causes the  subject  to  be  replaced  with  the  replacement  value.  The
              replacement is subject to substitutions in the same way as for the spam command: %L
              for the text to the left of the match, %R for text to the right of the  match,  and
              %1  for  the  first  subgroup  in  the match (etc). If you simply want to erase the
              match, set it to “%L%R”. Any number of subjectrx commands may coexist.

              Note this well: the replacement value replaces the entire  subject,  not  just  the
              match!

              unsubjectrx  removes  a given subjectrx from the substitution list. If * is used as
              the pattern, all substitutions will be removed.

       unhook [ *  | hook-type ]
              This command will remove all hooks of a given type, or all hooks when “*”  is  used
              as an argument.  hook-type can be any of the -hook commands documented above.

       mailto_allow header-field [ ... ]
       unmailto_allow [ * | header-field ... ]

              These  commands  allow  the  user  to modify the list of allowed header fields in a
              mailto: URL that Mutt will include in the the generated message.   By  default  the
              list contains only subject and body, as specified by RFC2368.

PATTERNS

       In  various places with mutt, including some of the above mentioned hook commands, you can
       specify patterns to match messages.

   Constructing Patterns
       A simple pattern consists of an operator of the form “~character”, possibly followed by  a
       parameter  against  which mutt is supposed to match the object specified by this operator.
       For some characters, the ~ may be replaced by another character to alter the  behavior  of
       the match.  These are described in the list of operators, below.

       With  some  of  these  operators,  the  object  to  be  matched consists of several e-mail
       addresses.  In these cases, the object  is  matched  if  at  least  one  of  these  e-mail
       addresses  matches.  You  can  prepend a hat (“^”) character to such a pattern to indicate
       that all addresses must match in order to match the object.

       You can construct complex patterns by combining simple patterns  with  logical  operators.
       Logical  AND  is  specified  by simply concatenating two simple patterns, for instance “~C
       mutt-dev ~s bug”.  Logical OR is specified by inserting a vertical bar (“|”)  between  two
       patterns,  for instance “~C mutt-dev | ~s bug”.  Additionally, you can negate a pattern by
       prepending a bang (“!”) character.  For logical  grouping,  use  braces  (“()”).  Example:
       “!(~t mutt|~c mutt) ~f elkins”.

   Simple Patterns
       Mutt understands the following simple patterns:

       ~A          all messages
       ~b EXPR     messages which contain EXPR in the message body.
       =b STRING   If IMAP is enabled, like ~b but searches for STRING on the server, rather than
                   downloading each message and searching it locally.
       ~B EXPR     messages which contain EXPR in the whole message.
       =B STRING   If IMAP is enabled, like ~B but searches for STRING on the server, rather than
                   downloading each message and searching it locally.
       ~c EXPR     messages carbon-copied to EXPR
       %c GROUP    messages carbon-copied to any member of GROUP
       ~C EXPR     messages either to: or cc: EXPR
       %C GROUP    messages either to: or cc: to any member of GROUP
       ~d MIN-MAX  messages with “date-sent” in a Date range
       ~D          deleted messages
       ~e EXPR     messages which contain EXPR in the “Sender” field
       %e GROUP    messages which contain a member of GROUP in the “Sender” field
       ~E          expired messages
       ~f EXPR     messages originating from EXPR
       %f GROUP    messages originating from any member of GROUP
       ~F          flagged messages
       ~g          PGP signed messages
       ~G          PGP encrypted messages
       ~h EXPR     messages which contain EXPR in the message header
       =h STRING   If IMAP is enabled, like ~h but searches for STRING on the server, rather than
                   downloading each message and searching it locally.  STRING must be of the form
                   “header: substring”
       ~H EXPR     messages with spam tags matching EXPR
       ~i EXPR     messages which match EXPR in the “Message-ID” field
       ~k          messages containing PGP key material
       ~l          messages  addressed  to  a  known mailing list (defined by either subscribe or
                   list)
       ~L EXPR     messages either originated or received by EXPR
       %L GROUP    messages either originated or received by any member of GROUP
       ~m MIN-MAX  message in the range MIN to MAX
       ~M EXPR     messages which contain a mime Content-Type matching EXPR
       ~n MIN-MAX  messages with a score in the range MIN to MAX
       ~N          new messages
       ~O          old messages
       ~p          messages addressed to you (as defined by alternates)
       ~P          messages from you (as defined by alternates)
       ~Q          messages which have been replied to
       ~r MIN-MAX  messages with “date-received” in a Date range
       ~R          read messages
       ~s EXPR     messages having EXPR in the “Subject” field.
       ~S          superseded messages
       ~t EXPR     messages addressed to EXPR
       ~T          tagged messages
       ~u          messages  addressed  to  a  subscribed  mailing  list  (defined  by  subscribe
                   commands)
       ~U          unread messages
       ~v          message is part of a collapsed thread.
       ~V          cryptographically verified messages
       ~x EXPR     messages which contain EXPR in the “References” or “In-Reply-To” field
       ~X MIN-MAX  messages with MIN - MAX attachments
       ~y EXPR     messages which contain EXPR in the “X-Label” field
       ~z MIN-MAX  messages with a size in the range MIN to MAX
       ~=          duplicated messages (see $duplicate_threads)
       ~$          unreferenced message (requires threaded view)
       ~(PATTERN)  messages  in  threads containing messages matching a certain pattern, e.g. all
                   threads containing messages from you: ~(~P)
       ~<(PATTERN) messages  whose  immediate  parent  matches  PATTERN,  e.g.  replies  to  your
                   messages: ~<(~P)
       ~>(PATTERN) messages having an immediate child matching PATTERN, e.g. messages you replied
                   to: ~>(~P)

       In the above, EXPR is a regular expression.

       With the ~d, ~m, ~n, ~r, ~X, and ~z operators, you can also specify ranges  in  the  forms
       <MAX, >MIN, MIN-, and -MAX.

       With  the  ~z  operator,  the  suffixes  “K”  and  “M” are allowed to specify kilobyte and
       megabyte respectively.

       The ~b, ~B, ~h, ~M, and ~X operators require reading each message in, which  can  be  much
       slower.

       You  can  force  Mutt  to treat EXPR as a simple string instead of a regular expression by
       using = instead of ~ in the pattern name.

   Matching dates
       The ~d and ~r operators are used to match date ranges, which are interpreted to  be  given
       in your local time zone.

       A  date is of the form DD[/MM[/[cc]YY]], that is, a two-digit date, optionally followed by
       a two-digit month, optionally followed by a year specifications.  Omitted  fields  default
       to the current month and year.

       Mutt  understands  either  two  or four digit year specifications.  When given a two-digit
       year, mutt will interpret values less than 70 as lying in the  21st  century  (i.e.,  “38”
       means  2038  and  not  1938,  and “00” is interpreted as 2000), and values greater than or
       equal to 70 as lying in the 20th century.

       Note that this behavior is Y2K compliant, but that mutt does have a Y2.07K problem.

       If a date range consists of a single date,  the  operator  in  question  will  match  that
       precise  date.  If the date range consists of a dash (“-”), followed by a date, this range
       will match any date before and up to the date given.  Similarly, a date followed by a dash
       matches the date given and any later point of time.  Two dates, separated by a dash, match
       any date which lies in the given range of time.

       You can also modify any absolute date by giving an error range.  An error  range  consists
       of  one  of  the characters +, -, *, followed by a positive number, followed by one of the
       unit characters y, m, w, or d, specifying a unit of years,  months,  weeks,  or  days.   +
       increases  the maximum date matched by the given interval of time, - decreases the minimum
       date matched by the given interval of time, and * increases the maximum date and decreases
       the  minimum  date matched by the given interval of time.  It is possible to give multiple
       error margins, which cumulate.  Example: 1/1/2001-1w+2w*3d

       You can also specify offsets relative to the current date.  An offset is specified as  one
       of  the  characters  <,  >,  =, followed by a positive number, followed by one of the unit
       characters y, m, w, or d.  > matches dates which are older than the  specified  amount  of
       time, an offset which begins with the character < matches dates which are more recent than
       the specified amount of time, and an offset which begins  with  the  character  =  matches
       points of time which are precisely the given amount of time ago.

CONFIGURATION VARIABLES

       abort_noattach
              Type: quadoption
              Default: no

              When  the  body  of  the  message  matches  $abort_noattach_regexp and there are no
              attachments, this quadoption controls whether to abort sending the message.

       abort_noattach_regexp
              Type: regular expression
              Default: “attach”

              Specifies a regular expression to  match  against  the  body  of  the  message,  to
              determine  if an attachment was mentioned but mistakenly forgotten.  If it matches,
              $abort_noattach will be consulted to determine if message sending will be aborted.

              Like other regular expressions in Mutt, the search is case sensitive if the pattern
              contains at least one upper case letter, and case insensitive otherwise.

       abort_nosubject
              Type: quadoption
              Default: ask-yes

              If  set  to  yes,  when  composing  messages and no subject is given at the subject
              prompt, composition will be aborted.  If set to  no,  composing  messages  with  no
              subject given at the subject prompt will never be aborted.

       abort_unmodified
              Type: quadoption
              Default: yes

              If  set to yes, composition will automatically abort after editing the message body
              if no changes are made to the file (this check only happens after the first edit of
              the file).  When set to no, composition will never be aborted.

       alias_file
              Type: path
              Default: “~/.muttrc”

              The  default  file in which to save aliases created by the <create-alias> function.
              Entries added  to  this  file  are  encoded  in  the  character  set  specified  by
              $config_charset if it is set or the current character set otherwise.

              Note:  Mutt  will  not  automatically source this file; you must explicitly use the
              “source” command for it to be executed in case this option points  to  a  dedicated
              alias file.

              The default for this option is the currently used muttrc file, or “~/.muttrc” if no
              user muttrc was found.

       alias_format
              Type: string
              Default: “%4n %2f %t %-10a   %r”

              Specifies the format of the data displayed for the  “alias”  menu.   The  following
              printf(3)-style sequences are available:
              %a     alias name
              %f     flags - currently, a “d” for an alias marked for deletion
              %n     index number
              %r     address which alias expands to
              %t     character which indicates if the alias is tagged for inclusion

       allow_8bit
              Type: boolean
              Default: yes

              Controls whether 8-bit data is converted to 7-bit using either Quoted- Printable or
              Base64 encoding when sending mail.

       allow_ansi
              Type: boolean
              Default: no

              Controls whether ANSI color  codes  in  messages  (and  color  tags  in  rich  text
              messages)  are to be interpreted.  Messages containing these codes are rare, but if
              this option is set, their text will be colored  accordingly.  Note  that  this  may
              override  your  color choices, and even present a security problem, since a message
              could include a line like

              [-- PGP output follows ...

              and give it the same color as your attachment color (see also $crypt_timestamp).

       arrow_cursor
              Type: boolean
              Default: no

              When set, an arrow (“->”) will be used to  indicate  the  current  entry  in  menus
              instead  of  highlighting the whole line.  On slow network or modem links this will
              make response faster because there is less that has to be  redrawn  on  the  screen
              when moving to the next or previous entries in the menu.

       ascii_chars
              Type: boolean
              Default: no

              If  set, Mutt will use plain ASCII characters when displaying thread and attachment
              trees, instead of the default ACS characters.

       askbcc
              Type: boolean
              Default: no

              If set, Mutt will prompt you for blind-carbon-copy (Bcc) recipients before  editing
              an outgoing message.

       askcc
              Type: boolean
              Default: no

              If  set,  Mutt  will  prompt you for carbon-copy (Cc) recipients before editing the
              body of an outgoing message.

       assumed_charset
              Type: string
              Default: “”

              This variable is a colon-separated list of character encoding schemes for  messages
              without  character  encoding  indication.   Header  field  values  and message body
              content without character encoding  indication  would  be  assumed  that  they  are
              written  in  one  of this list.  By default, all the header fields and message body
              without any charset indication are assumed to be in “us-ascii”.

              For example, Japanese users might prefer this:

              set assumed_charset=”iso-2022-jp:euc-jp:shift_jis:utf-8”

              However, only the first content is valid for the message body.

       attach_charset
              Type: string
              Default: “”

              This variable is a colon-separated list of character encoding schemes for text file
              attachments.  Mutt  uses  this setting to guess which encoding files being attached
              are encoded in to convert them to a proper character set given in $send_charset.

              If unset, the value of $charset will be used instead.  For example,  the  following
              configuration would work for Japanese text handling:

              set attach_charset=”iso-2022-jp:euc-jp:shift_jis:utf-8”

              Note:  for  Japanese  users,  “iso-2022-*”  must be put at the head of the value as
              shown above if included.

       attach_format
              Type: string
              Default: “%u%D%I %t%4n %T%.40d%> [%.7m/%.10M, %.6e%?C?, %C?, %s] ”

              This variable describes  the  format  of  the  “attachment”  menu.   The  following
              printf(3)-style sequences are understood:
              %C     charset
              %c     requires charset conversion (“n” or “c”)
              %D     deleted flag
              %d     description (if none, falls back to %F)
              %e     MIME content-transfer-encoding
              %F     filename in content-disposition header (if none, falls back to %f)
              %f     filename
              %I     disposition (“I” for inline, “A” for attachment)
              %m     major MIME type
              %M     MIME subtype
              %n     attachment number
              %Q     “Q”, if MIME part qualifies for attachment counting
              %s     size
              %t     tagged flag
              %T     graphic tree characters
              %u     unlink (=to delete) flag
              %X     number  of  qualifying  MIME parts in this part and its children (please see
                     the “attachments” section for possible speed effects)
              %>X    right justify the rest of the string and pad with character “X”
              %|X    pad to the end of the line with character “X”
              %*X    soft-fill with character “X” as pad

              For an explanation of “soft-fill”, see the $index_format documentation.

       attach_sep
              Type: string
              Default: “\n”

              The separator to add between attachments when operating (saving, printing,  piping,
              etc) on a list of tagged attachments.

       attach_split
              Type: boolean
              Default: yes

              If this variable is unset, when operating (saving, printing, piping, etc) on a list
              of tagged attachments, Mutt will concatenate the attachments and  will  operate  on
              them  as  a  single  attachment.  The  $attach_sep  separator  is  added after each
              attachment. When set, Mutt will operate on the attachments one by one.

       attribution
              Type: string
              Default: “On %d, %n wrote:”

              This is the string that will precede a message which has been included in a  reply.
              For  a  full  listing  of  defined  printf(3)-like  sequences  see  the  section on
              $index_format.

       attribution_locale
              Type: string
              Default: “”

              The locale used by strftime(3) to format dates in the  attribution  string.   Legal
              values  are  the  strings  your  system accepts for the locale environment variable
              $LC_TIME.

              This variable is to allow the attribution date format to be customized by recipient
              or folder using hooks.  By default, Mutt will use your locale environment, so there
              is no need to set this except to override that default.

       auto_tag
              Type: boolean
              Default: no

              When set, functions in the index menu which affect a message will be applied to all
              tagged  messages  (if  there  are  any).   When  unset,  you  must  first  use  the
              <tag-prefix> function (bound to “;” by default) to make the next function apply  to
              all tagged messages.

       autoedit
              Type: boolean
              Default: no

              When  set along with $edit_headers, Mutt will skip the initial send-menu (prompting
              for subject and recipients) and allow you to immediately begin editing the body  of
              your  message.   The send-menu may still be accessed once you have finished editing
              the body of your message.

              Note: when this option is set,  you  cannot  use  send-hooks  that  depend  on  the
              recipients  when  composing  a  new  (non-reply)  message,  as  the initial list of
              recipients is empty.

              Also see $fast_reply.

       beep
              Type: boolean
              Default: yes

              When this variable is set, mutt will beep when an error occurs.

       beep_new
              Type: boolean
              Default: no

              When this variable is set, mutt will beep whenever it prints  a  message  notifying
              you of new mail.  This is independent of the setting of the $beep variable.

       bounce
              Type: quadoption
              Default: ask-yes

              Controls whether you will be asked to confirm bouncing messages.  If set to yes you
              don't get asked if you want to bounce a message. Setting this variable to no is not
              generally  useful,  and  thus  not  recommended,  because  you are unable to bounce
              messages.

       bounce_delivered
              Type: boolean
              Default: yes

              When this variable is set, mutt will include  Delivered-To  headers  when  bouncing
              messages.  Postfix users may wish to unset this variable.

       braille_friendly
              Type: boolean
              Default: no

              When  this  variable  is  set,  mutt  will place the cursor at the beginning of the
              current line in menus, even when the $arrow_cursor variable  is  unset,  making  it
              easier  for blind persons using Braille displays to follow these menus.  The option
              is unset by default because many visual terminals don't permit  making  the  cursor
              invisible.

       browser_abbreviate_mailboxes
              Type: boolean
              Default: yes

              When  this  variable  is  set,  mutt  will  abbreviate mailbox names in the browser
              mailbox list, using '~' and '=' shortcuts.

              The default ”alpha” setting  of  $sort_browser  uses  locale-based  sorting  (using
              strcoll(3)),  which  ignores  some  punctuation.   This can lead to some situations
              where the order doesn't make intuitive sense.  In those cases, it may be  desirable
              to unset this variable.

       certificate_file
              Type: path
              Default: “~/.mutt_certificates”

              This  variable  specifies the file where the certificates you trust are saved. When
              an unknown certificate is encountered, you are asked if you accept it  or  not.  If
              you  accept  it,  the  certificate  can  also  be  saved  in  this file and further
              connections are automatically accepted.

              You can also manually add CA certificates in this file. Any server certificate that
              is signed with one of these CA certificates is also automatically accepted.

              Example:

              set certificate_file=~/.mutt/certificates

       change_folder_next
              Type: boolean
              Default: no

              When  this  variable  is  set, the <change-folder> function mailbox suggestion will
              start at the next folder in your “mailboxes” list, instead of starting at the first
              folder in the list.

       charset
              Type: string
              Default: “”

              Character set your terminal uses to display and enter textual data.  It is also the
              fallback for $send_charset.

              Upon startup Mutt tries to derive this value from  environment  variables  such  as
              $LC_CTYPE or $LANG.

              Note:  It should only be set in case Mutt isn't able to determine the character set
              used correctly.

       check_mbox_size
              Type: boolean
              Default: no

              When this variable is set, mutt will use file size attribute instead of access time
              when checking for new mail in mbox and mmdf folders.

              This  variable  is  unset  by  default  and  should  only  be enabled when new mail
              detection for these folder types is unreliable or doesn't work.

              Note that enabling this variable should happen before  any  “mailboxes”  directives
              occur  in  configuration files regarding mbox or mmdf folders because mutt needs to
              determine the initial new mail status of  such  a  mailbox  by  performing  a  fast
              mailbox scan when it is defined.  Afterwards the new mail status is tracked by file
              size changes.

       check_new
              Type: boolean
              Default: yes

              Note: this option only affects maildir and MH style mailboxes.

              When set, Mutt will check for  new  mail  delivered  while  the  mailbox  is  open.
              Especially  with  MH  mailboxes,  this  operation can take quite some time since it
              involves scanning the directory and checking each file to see  if  it  has  already
              been  looked  at.   If  this  variable is unset, no check for new mail is performed
              while the mailbox is open.

       collapse_unread
              Type: boolean
              Default: yes

              When unset, Mutt will not collapse a thread if it contains any unread messages.

       compose_format
              Type: string
              Default: “-- Mutt: Compose  [Approx. msg size: %l   Atts: %a]%>-”

              Controls the format of the status line  displayed  in  the  “compose”  menu.   This
              string  is  similar  to  $status_format,  but  has  its  own  set of printf(3)-like
              sequences:
              %a     total number of attachments
              %h     local hostname
              %l     approximate size (in bytes) of the current message
              %v     Mutt version string

              See the text describing the $status_format option for more information  on  how  to
              set $compose_format.

       config_charset
              Type: string
              Default: “”

              When  defined,  Mutt  will  recode  commands  in rc files from this encoding to the
              current character set as specified by $charset and aliases written  to  $alias_file
              from the current character set.

              Please   note   that   if   setting   $charset  it  must  be  done  before  setting
              $config_charset.

              Recoding should be avoided as it may render unconvertable  characters  as  question
              marks   which   can  lead  to  undesired  side  effects  (for  example  in  regular
              expressions).

       confirmappend
              Type: boolean
              Default: yes

              When set, Mutt will prompt for confirmation when appending messages to an  existing
              mailbox.

       confirmcreate
              Type: boolean
              Default: yes

              When set, Mutt will prompt for confirmation when saving messages to a mailbox which
              does not yet exist before creating it.

       connect_timeout
              Type: number
              Default: 30

              Causes Mutt to timeout a network connection (for IMAP, POP or SMTP) after this many
              seconds  if  the connection is not able to be established.  A negative value causes
              Mutt to wait indefinitely for the connection attempt to succeed.

       content_type
              Type: string
              Default: “text/plain”

              Sets the default Content-Type for the body of newly composed messages.

       copy
              Type: quadoption
              Default: yes

              This variable controls whether or not copies of  your  outgoing  messages  will  be
              saved  for  later  references.  Also see $record, $save_name, $force_name and “fcc-
              hook”.

       crypt_autoencrypt
              Type: boolean
              Default: no

              Setting this variable will cause Mutt to always attempt  to  PGP  encrypt  outgoing
              messages.   This  is probably only useful in connection to the “send-hook” command.
              It can be overridden by use of the pgp menu, when encryption  is  not  required  or
              signing  is  requested  as well.  If $smime_is_default is set, then OpenSSL is used
              instead to create S/MIME messages and settings can be  overridden  by  use  of  the
              smime menu instead.  (Crypto only)

       crypt_autopgp
              Type: boolean
              Default: yes

              This   variable   controls  whether  or  not  mutt  may  automatically  enable  PGP
              encryption/signing for messages.  See also $crypt_autoencrypt, $crypt_replyencrypt,
              $crypt_autosign, $crypt_replysign and $smime_is_default.

       crypt_autosign
              Type: boolean
              Default: no

              Setting  this  variable will cause Mutt to always attempt to cryptographically sign
              outgoing messages.  This can be overridden by use of the pgp menu, when signing  is
              not  required or encryption is requested as well. If $smime_is_default is set, then
              OpenSSL is used instead to create S/MIME messages and settings can be overridden by
              use of the smime menu instead of the pgp menu.  (Crypto only)

       crypt_autosmime
              Type: boolean
              Default: yes

              This  variable  controls  whether  or  not  mutt  may  automatically  enable S/MIME
              encryption/signing for messages. See also $crypt_autoencrypt,  $crypt_replyencrypt,
              $crypt_autosign, $crypt_replysign and $smime_is_default.

       crypt_confirmhook
              Type: boolean
              Default: yes

              If  set,  then  you  will  be  prompted  for  confirmation  of  keys when using the
              crypt-hook command.  If unset, no such confirmation prompt will be presented.  This
              is generally considered unsafe, especially where typos are concerned.

       crypt_opportunistic_encrypt
              Type: boolean
              Default: no

              Setting  this  variable  will  cause  Mutt  to  automatically  enable  and  disable
              encryption, based on whether all message recipient keys can be located by Mutt.

              When this option is enabled, Mutt will enable/disable encryption each time the  TO,
              CC,  and  BCC lists are edited.  If $edit_headers is set, Mutt will also do so each
              time the message is edited.

              While this is set, encryption can't be manually enabled/disabled.  The pgp or smime
              menus  provide  a  selection  to  temporarily  disable  this option for the current
              message.

              If $crypt_autoencrypt or $crypt_replyencrypt enable encryption for a message,  this
              option will be disabled for that message.  It can be manually re-enabled in the pgp
              or smime menus.  (Crypto only)

       crypt_replyencrypt
              Type: boolean
              Default: yes

              If set, automatically  PGP  or  OpenSSL  encrypt  replies  to  messages  which  are
              encrypted.  (Crypto only)

       crypt_replysign
              Type: boolean
              Default: no

              If set, automatically PGP or OpenSSL sign replies to messages which are signed.

              Note: this does not work on messages that are encrypted and signed!  (Crypto only)

       crypt_replysignencrypted
              Type: boolean
              Default: no

              If  set, automatically PGP or OpenSSL sign replies to messages which are encrypted.
              This makes sense in combination with $crypt_replyencrypt, because it allows you  to
              sign all messages which are automatically encrypted.  This works around the problem
              noted in $crypt_replysign, that mutt is not able to find out whether  an  encrypted
              message is also signed.  (Crypto only)

       crypt_timestamp
              Type: boolean
              Default: yes

              If  set,  mutt  will  include  a  time stamp in the lines surrounding PGP or S/MIME
              output, so spoofing such lines is more difficult.  If you are using colors to  mark
              these lines, and rely on these, you may unset this setting.  (Crypto only)

       crypt_use_gpgme
              Type: boolean
              Default: no

              This  variable controls the use of the GPGME-enabled crypto backends.  If it is set
              and Mutt was built with gpgme support, the gpgme code for S/MIME and  PGP  will  be
              used  instead  of  the  classic  code.   Note  that  you need to set this option in
              .muttrc; it won't have any effect when used interactively.

              Note  that  the  GPGME  backend  does  not  support   creating   old-style   inline
              (traditional) PGP encrypted or signed messages (see $pgp_autoinline).

       crypt_use_pka
              Type: boolean
              Default: no

              Controls  whether  mutt  uses PKA (see http://www.g10code.de/docs/pka-intro.de.pdf)
              during signature verification (only supported by the GPGME backend).

       crypt_verify_sig
              Type: quadoption
              Default: yes

              If “yes”, always attempt to verify PGP  or  S/MIME  signatures.   If  “ask-*”,  ask
              whether  or  not  to  verify  the  signature.   If  “no”,  never  attempt to verify
              cryptographic signatures.  (Crypto only)

       date_format
              Type: string
              Default: “!%a, %b %d, %Y at %I:%M:%S%p %Z”

              This variable controls the format of the date  printed  by  the  “%d”  sequence  in
              $index_format.  This is passed to the strftime(3) function to process the date, see
              the man page for the proper syntax.

              Unless the first character in the string is a bang (“!”), the month  and  week  day
              names  are  expanded according to the locale.  If the first character in the string
              is a bang, the bang is discarded, and the month and week day names in the  rest  of
              the string are expanded in the C locale (that is in US English).

       default_hook
              Type: string
              Default: “~f %s !~P | (~P ~C %s)”

              This variable controls how “message-hook”, “reply-hook”, “send-hook”, “send2-hook”,
              “save-hook”, and “fcc-hook” will be interpreted if they are specified with  only  a
              simple regexp, instead of a matching pattern.  The hooks are expanded when they are
              declared, so a hook will be interpreted according to the value of this variable  at
              the time the hook is declared.

              The default value matches if the message is either from a user matching the regular
              expression given, or if it is from you (if the from address  matches  “alternates”)
              and is to or cc'ed to a user matching the given regular expression.

       delete
              Type: quadoption
              Default: ask-yes

              Controls whether or not messages are really deleted when closing or synchronizing a
              mailbox.  If set to yes, messages marked for deleting will automatically be  purged
              without  prompting.  If set to no, messages marked for deletion will be kept in the
              mailbox.

       delete_untag
              Type: boolean
              Default: yes

              If this option is set, mutt will untag messages when  marking  them  for  deletion.
              This  applies  when  you either explicitly delete a message, or when you save it to
              another folder.

       digest_collapse
              Type: boolean
              Default: yes

              If this option is set, mutt's received-attachments menu will not show the  subparts
              of  individual messages in a multipart/digest.  To see these subparts, press “v” on
              that menu.

       display_filter
              Type: path
              Default: “”

              When set, specifies a command used to filter messages.  When a message is viewed it
              is  passed  as  standard input to $display_filter, and the filtered message is read
              from the standard output.

       dotlock_program
              Type: path
              Default: “/usr/bin/mutt_dotlock”

              Contains the path of the mutt_dotlock(8) binary to be used by mutt.

       dsn_notify
              Type: string
              Default: “”

              This variable sets the request for  when  notification  is  returned.   The  string
              consists  of  a  comma separated list (no spaces!) of one or more of the following:
              never,  to  never  request  notification,  failure,  to  request  notification   on
              transmission  failure,  delay,  to  be  notified  of message delays, success, to be
              notified of successful transmission.

              Example:

              set dsn_notify=”failure,delay”

              Note: when using $sendmail for delivery, you should not enable this unless you  are
              either  using Sendmail 8.8.x or greater or a MTA providing a sendmail(1)-compatible
              interface supporting the -N option for DSN.  For  SMTP  delivery,  DSN  support  is
              auto-detected so that it depends on the server whether DSN will be used or not.

       dsn_return
              Type: string
              Default: “”

              This  variable  controls  how much of your message is returned in DSN messages.  It
              may be set to either hdrs to return just the message header, or full to return  the
              full message.

              Example:

              set dsn_return=hdrs

              Note:  when using $sendmail for delivery, you should not enable this unless you are
              either using Sendmail 8.8.x or greater or a MTA providing a  sendmail(1)-compatible
              interface  supporting  the  -R  option  for  DSN. For SMTP delivery, DSN support is
              auto-detected so that it depends on the server whether DSN will be used or not.

       duplicate_threads
              Type: boolean
              Default: yes

              This variable controls whether mutt, when $sort is set to threads, threads messages
              with  the  same Message-Id together.  If it is set, it will indicate that it thinks
              they are duplicates of each other with an equals sign in the thread tree.

       edit_headers
              Type: boolean
              Default: no

              This option allows you to edit the header of your outgoing messages along with  the
              body of your message.

              Although  the  compose  menu may have localized header labels, the labels passed to
              your editor will be standard RFC 2822 headers, (e.g. To:, Cc:, Subject:).   Headers
              added  in  your  editor must also be RFC 2822 headers, or one of the pseudo headers
              listed in “edit-header”.  Mutt will not understand localized header labels, just as
              it would not when parsing an actual email.

              Note  that  changes  made  to  the  References:  and  Date: headers are ignored for
              interoperability reasons.

       editor
              Type: path
              Default: “”

              This variable specifies which editor is used by mutt.  It defaults to the value  of
              the  $VISUAL, or $EDITOR, environment variable, or to the string “vi” if neither of
              those are set.

              The $editor string may contain a %s escape, which will be replaced by the  name  of
              the  file  to  be edited.  If the %s escape does not appear in $editor, a space and
              the name to be edited are appended.

              The resulting string is then executed by running

              sh -c 'string'

              where string is the expansion of $editor described above.

       encode_from
              Type: boolean
              Default: no

              When set, mutt will quoted-printable encode messages when they contain  the  string
              “From  ”  (note  the trailing space) in the beginning of a line.  This is useful to
              avoid the tampering certain mail delivery and transport  agents  tend  to  do  with
              messages (in order to prevent tools from misinterpreting the line as a mbox message
              separator).

       entropy_file
              Type: path
              Default: “”

              The file which includes  random  data  that  is  used  to  initialize  SSL  library
              functions.

       envelope_from_address
              Type: e-mail address
              Default: “”

              Manually  sets the envelope sender for outgoing messages.  This value is ignored if
              $use_envelope_from is unset.

       error_history
              Type: number
              Default: 30

              This variable controls the size (in number of  strings  remembered)  of  the  error
              messages  displayed by mutt.  These can be shown with the <error-history> function.
              The history is cleared each time this variable is set.

       escape
              Type: string
              Default: “~”

              Escape character to use for functions in the built-in editor.

       fast_reply
              Type: boolean
              Default: no

              When set, the initial prompt for recipients and subject are skipped  when  replying
              to  messages,  and  the  initial  prompt  for  subject  is  skipped when forwarding
              messages.

              Note: this variable has no effect when the $autoedit variable is set.

       fcc_attach
              Type: quadoption
              Default: yes

              This variable controls whether or not attachments on outgoing  messages  are  saved
              along with the main body of your message.

       fcc_clear
              Type: boolean
              Default: no

              When  this variable is set, FCCs will be stored unencrypted and unsigned, even when
              the actual message is encrypted and/or signed.  (PGP only)

       flag_safe
              Type: boolean
              Default: no

              If set, flagged messages cannot be deleted.

       folder
              Type: path
              Default: “~/Mail”

              Specifies the default location of your mailboxes.  A “+” or “=” at the beginning of
              a pathname will be expanded to the value of this variable.  Note that if you change
              this variable (from the default) value you need to make sure  that  the  assignment
              occurs  before  you  use  “+”  or “=” for any other variables since expansion takes
              place when handling the “mailboxes” command.

       folder_format
              Type: string
              Default: “%2C %t %N %F %2l %-8.8u %-8.8g %8s %d %f”

              This variable allows you to customize the file browser  display  to  your  personal
              taste.   This  string  is  similar  to  $index_format,  but  has  its  own  set  of
              printf(3)-like sequences:
              %C     current file number
              %d     date/time folder was last modified
              %D     date/time folder was last modified using $date_format.
              %f     filename (“/” is appended to directory names, “@” to symbolic links and  “*”
                     to executable files)
              %F     file permissions
              %g     group name (or numeric gid, if missing)
              %l     number of hard links
              %m     number of messages in the mailbox *
              %n     number of unread messages in the mailbox *
              %N     N if mailbox has new mail, blank otherwise
              %s     size in bytes
              %t     “*” if the file is tagged, blank otherwise
              %u     owner name (or numeric uid, if missing)
              %>X    right justify the rest of the string and pad with character “X”
              %|X    pad to the end of the line with character “X”
              %*X    soft-fill with character “X” as pad

              For an explanation of “soft-fill”, see the $index_format documentation.

              * = can be optionally printed if nonzero

              %m, %n, and %N only work for monitored mailboxes.  %m requires $mail_check_stats to
              be set.  %n requires $mail_check_stats to be set (except for IMAP mailboxes).

       followup_to
              Type: boolean
              Default: yes

              Controls whether or not the “Mail-Followup-To:”  header  field  is  generated  when
              sending  mail.   When set, Mutt will generate this field when you are replying to a
              known mailing list, specified with the “subscribe” or “lists” commands.

              This field has two purposes.  First, preventing you from receiving duplicate copies
              of  replies  to messages which you send to mailing lists, and second, ensuring that
              you do get a reply separately for any messages sent to known lists to which you are
              not subscribed.

              The  header will contain only the list's address for subscribed lists, and both the
              list address and your own email  address  for  unsubscribed  lists.   Without  this
              header,  a  group  reply  to your message sent to a subscribed list will be sent to
              both the list and your address, resulting in two copies of the same email for you.

       force_name
              Type: boolean
              Default: no

              This variable is similar to $save_name, except that Mutt will store a copy of  your
              outgoing  message  by  the  username of the address you are sending to even if that
              mailbox does not exist.

              Also see the $record variable.

       forward_attribution_intro
              Type: string
              Default: “----- Forwarded message from %f -----”

              This is the string that will precede a message which has been forwarded in the main
              body  of  a  message  (when $mime_forward is unset).  For a full listing of defined
              printf(3)-like  sequences   see   the   section   on   $index_format.    See   also
              $attribution_locale.

       forward_attribution_trailer
              Type: string
              Default: “----- End forwarded message -----”

              This  is the string that will follow a message which has been forwarded in the main
              body of a message (when $mime_forward is unset).  For a  full  listing  of  defined
              printf(3)-like   sequences   see   the   section   on   $index_format.    See  also
              $attribution_locale.

       forward_decode
              Type: boolean
              Default: yes

              Controls the decoding of complex MIME messages into text/plain  when  forwarding  a
              message.   The message header is also RFC2047 decoded.  This variable is only used,
              if $mime_forward is unset, otherwise $mime_forward_decode is used instead.

       forward_decrypt
              Type: boolean
              Default: yes

              Controls the handling of encrypted messages when forwarding a message.   When  set,
              the  outer  layer  of  encryption  is  stripped off.  This variable is only used if
              $mime_forward is set and $mime_forward_decode is unset.  (PGP only)

       forward_edit
              Type: quadoption
              Default: yes

              This quadoption controls whether or not the user is  automatically  placed  in  the
              editor  when  forwarding  messages.   For  those who always want to forward with no
              modification, use a setting of “no”.

       forward_format
              Type: string
              Default: “[%a: %s]”

              This variable controls the default subject when forwarding a message.  It uses  the
              same format sequences as the $index_format variable.

       forward_quote
              Type: boolean
              Default: no

              When  set,  forwarded  messages  included  in  the  main  body of the message (when
              $mime_forward is unset) will be quoted using $indent_string.

       from
              Type: e-mail address
              Default: “”

              When set, this variable contains a default from  address.   It  can  be  overridden
              using  “my_hdr” (including from a “send-hook”) and $reverse_name.  This variable is
              ignored if $use_from is unset.

              This setting defaults to the contents of the environment variable $EMAIL.

       gecos_mask
              Type: regular expression
              Default: “^[^,]*”

              A regular expression used by mutt to parse the GECOS field of a password entry when
              expanding  the alias.  The default value will return the string up to the first “,”
              encountered.  If the GECOS field contains a string like “lastname, firstname”  then
              you should set it to “.*”.

              This can be useful if you see the following behavior: you address an e-mail to user
              ID “stevef” whose full name is “Steve  Franklin”.   If  mutt  expands  “stevef”  to
              “”Franklin”  stevef@foo.bar”  then  you  should  set  the  $gecos_mask to a regular
              expression that will match the  whole  name  so  mutt  will  expand  “Franklin”  to
              “Franklin, Steve”.

       hdrs
              Type: boolean
              Default: yes

              When  unset,  the  header  fields  normally  added  by the “my_hdr” command are not
              created.  This variable must be unset before composing a new message or replying in
              order  to  take  effect.  If set, the user defined header fields are added to every
              new message.

       header
              Type: boolean
              Default: no

              When set, this variable causes Mutt to include the header of the  message  you  are
              replying to into the edit buffer.  The $weed setting applies.

       header_cache
              Type: path
              Default: “”

              This variable points to the header cache database.  If pointing to a directory Mutt
              will contain a header cache database file per folder, if pointing to  a  file  that
              file  will  be  a  single  global header cache. By default it is unset so no header
              caching will be used.

              Header caching can greatly improve speed when  opening  POP,  IMAP  MH  or  Maildir
              folders, see “caching” for details.

       header_cache_compress
              Type: boolean
              Default: yes

              When  mutt  is  compiled  with  qdbm, tokyocabinet, or kyotocabinet as header cache
              backend,  this  option  determines  whether  the  database  will   be   compressed.
              Compression  results  in  database  files  roughly  being  one  fifth  of the usual
              diskspace, but the decompression can result in a slower opening of cached folder(s)
              which in general is still much faster than opening non header cached folders.

       header_cache_pagesize
              Type: string
              Default: “16384”

              When  mutt  is  compiled with either gdbm or bdb4 as the header cache backend, this
              option changes the database page size.  Too large or too  small  values  can  waste
              space, memory, or CPU time. The default should be more or less optimal for most use
              cases.

       header_color_partial
              Type: boolean
              Default: no

              When set, color header regexps behave like color body regexps: color is applied  to
              the  exact  text matched by the regexp.  When unset, color is applied to the entire
              header.

              One use of this option might be to apply color to just the header labels.

              See “color” for more details.

       help
              Type: boolean
              Default: yes

              When set, help lines describing the bindings for the major  functions  provided  by
              each menu are displayed on the first line of the screen.

              Note:  The  binding  will  not be displayed correctly if the function is bound to a
              sequence rather than a single keystroke.  Also, the help line may not be updated if
              a binding is changed while Mutt is running.  Since this variable is primarily aimed
              at new users, neither of these should present a major problem.

       hidden_host
              Type: boolean
              Default: no

              When set, mutt will skip the host name part of $hostname variable when  adding  the
              domain  part  to  addresses.   This  variable  does  not  affect  the generation of
              Message-IDs, and it will not lead to the cut-off of first-level domains.

       hide_limited
              Type: boolean
              Default: no

              When set, mutt will not show the presence of messages that are hidden by  limiting,
              in the thread tree.

       hide_missing
              Type: boolean
              Default: yes

              When set, mutt will not show the presence of missing messages in the thread tree.

       hide_thread_subject
              Type: boolean
              Default: yes

              When  set,  mutt will not show the subject of messages in the thread tree that have
              the same subject as their parent or closest previously displayed sibling.

       hide_top_limited
              Type: boolean
              Default: no

              When set, mutt will not show the presence of messages that are hidden by  limiting,
              at  the  top  of  threads in the thread tree.  Note that when $hide_limited is set,
              this option will have no effect.

       hide_top_missing
              Type: boolean
              Default: yes

              When set, mutt will not show the presence of missing messages at the top of threads
              in  the thread tree.  Note that when $hide_missing is set, this option will have no
              effect.

       history
              Type: number
              Default: 10

              This variable controls the size (in number of strings  remembered)  of  the  string
              history buffer per category. The buffer is cleared each time the variable is set.

       history_file
              Type: path
              Default: “~/.mutthistory”

              The file in which Mutt will save its history.

              Also see $save_history.

       history_remove_dups
              Type: boolean
              Default: no

              When set, all of the string history will be scanned for duplicates when a new entry
              is added.  Duplicate entries in the $history_file will also be removed when  it  is
              periodically compacted.

       honor_disposition
              Type: boolean
              Default: no

              When  set,  Mutt  will  not  display attachments with a disposition of “attachment”
              inline even if it could render the part to plain text. These MIME parts can only be
              viewed from the attachment menu.

              If unset, Mutt will render all MIME parts it can properly transform to plain text.

       honor_followup_to
              Type: quadoption
              Default: yes

              This  variable  controls  whether  or not a Mail-Followup-To header is honored when
              group-replying to a message.

       hostname
              Type: string
              Default: “”

              Specifies the fully-qualified hostname of the system mutt is running on  containing
              the  host's  name  and  the DNS domain it belongs to. It is used as the domain part
              (after “@”) for local email addresses as well as Message-Id headers.

              Its value is determined at  startup  as  follows:  the  node's  hostname  is  first
              determined  by  the  uname(3)  function.   The  domain  is then looked up using the
              gethostname(2)  and  getaddrinfo(3)  functions.   If  those  calls  are  unable  to
              determine  the  domain, the full value returned by uname is used.  Optionally, Mutt
              can be compiled with a fixed domain name in which case a detected one is not used.

              Also see $use_domain and $hidden_host.

       idn_decode
              Type: boolean
              Default: yes

              When set, Mutt will show you international domain names decoded.  Note: You can use
              IDNs  for  addresses  even  if this is unset.  This variable only affects decoding.
              (IDN only)

       idn_encode
              Type: boolean
              Default: yes

              When set, Mutt will encode international domain names using  IDN.   Unset  this  if
              your SMTP server can handle newer (RFC 6531) UTF-8 encoded domains. (IDN only)

       ignore_linear_white_space
              Type: boolean
              Default: no

              This  option  replaces linear-white-space between encoded-word and text to a single
              space to prevent the display of MIME-encoded “Subject:” field  from  being  divided
              into multiple lines.

       ignore_list_reply_to
              Type: boolean
              Default: no

              Affects the behavior of the <reply> function when replying to messages from mailing
              lists (as defined by the “subscribe”  or  “lists”  commands).   When  set,  if  the
              “Reply-To:”  field  is  set to the same value as the “To:” field, Mutt assumes that
              the “Reply-To:” field was set by the mailing list  to  automate  responses  to  the
              list,  and  will  ignore this field.  To direct a response to the mailing list when
              this option is set, use the <list-reply> function; <group-reply> will reply to both
              the sender and the list.

       imap_authenticators
              Type: string
              Default: “”

              This is a colon-delimited list of authentication methods mutt may attempt to use to
              log in to an IMAP server, in  the  order  mutt  should  try  them.   Authentication
              methods  are  either  “login”  or  the  right side of an IMAP “AUTH=xxx” capability
              string, e.g. “digest-md5”, “gssapi” or “cram-md5”. This option is case-insensitive.
              If  it's  unset  (the  default)  mutt will try all available methods, in order from
              most-secure to least-secure.

              Example:

              set imap_authenticators=”gssapi:cram-md5:login”

              Note: Mutt will only fall back to other  authentication  methods  if  the  previous
              methods  are  unavailable.  If a method is available but authentication fails, mutt
              will not connect to the IMAP server.

       imap_check_subscribed
              Type: boolean
              Default: no

              When set, mutt will fetch the  set  of  subscribed  folders  from  your  server  on
              connection,  and  add them to the set of mailboxes it polls for new mail just as if
              you had issued individual “mailboxes” commands.

       imap_delim_chars
              Type: string
              Default: “/.”

              This contains the list of characters which  you  would  like  to  treat  as  folder
              separators  for  displaying  IMAP  paths.  In  particular it helps in using the “=”
              shortcut for your folder variable.

       imap_headers
              Type: string
              Default: “”

              Mutt requests these header fields in addition  to  the  default  headers  (“Date:”,
              “From:”,  “Subject:”,  “To:”, “Cc:”, “Message-Id:”, “References:”, “Content-Type:”,
              “Content-Description:”,  “In-Reply-To:”,   “Reply-To:”,   “Lines:”,   “List-Post:”,
              “X-Label:”) from IMAP servers before displaying the index menu. You may want to add
              more headers for spam detection.

              Note: This is a space separated list, items should be uppercase and not contain the
              colon,  e.g.  “X-BOGOSITY X-SPAM-STATUS” for the “X-Bogosity:” and “X-Spam-Status:”
              header fields.

       imap_idle
              Type: boolean
              Default: no

              When set, mutt will attempt to use the IMAP IDLE extension to check for new mail in
              the  current  mailbox.  Some  servers (dovecot was the inspiration for this option)
              react badly to mutt's  implementation.  If  your  connection  seems  to  freeze  up
              periodically, try unsetting this.

       imap_keepalive
              Type: number
              Default: 300

              This  variable  specifies the maximum amount of time in seconds that mutt will wait
              before polling open IMAP connections, to  prevent  the  server  from  closing  them
              before  mutt  has  finished with them. The default is well within the RFC-specified
              minimum amount of time (30 minutes) before a server is allowed to do this,  but  in
              practice  the  RFC  does get violated every now and then. Reduce this number if you
              find yourself getting disconnected from your IMAP server due to inactivity.

       imap_list_subscribed
              Type: boolean
              Default: no

              This variable configures whether IMAP folder browsing will look for only subscribed
              folders  or  all  folders.   This  can  be  toggled  in  the  IMAP browser with the
              <toggle-subscribed> function.

       imap_login
              Type: string
              Default: “”

              Your login name on the IMAP server.

              This variable defaults to the value of $imap_user.

       imap_oauth_refresh_command
              Type: string
              Default: “”

              The command to run  to  generate  an  OAUTH  refresh  token  for  authorizing  your
              connection  to  your  IMAP  server.   This  command will be run on every connection
              attempt that uses the OAUTHBEARER authentication mechanism.

       imap_pass
              Type: string
              Default: “”

              Specifies the password for your IMAP account.  If unset, Mutt will prompt  you  for
              your password when you invoke the <imap-fetch-mail> function or try to open an IMAP
              folder.

              Warning: you should only use this option when you are on a fairly  secure  machine,
              because  the  superuser  can  read your muttrc even if you are the only one who can
              read the file.

       imap_passive
              Type: boolean
              Default: yes

              When set, mutt will not open new IMAP connections to check for new mail.  Mutt will
              only  check  for  new  mail  over existing IMAP connections.  This is useful if you
              don't want to be prompted to user/password pairs on mutt invocation, or if  opening
              the connection is slow.

       imap_peek
              Type: boolean
              Default: yes

              When set, mutt will avoid implicitly marking your mail as read whenever you fetch a
              message from the server. This is generally a good thing, but can  make  closing  an
              IMAP folder somewhat slower. This option exists to appease speed freaks.

       imap_pipeline_depth
              Type: number
              Default: 15

              Controls  the number of IMAP commands that may be queued up before they are sent to
              the server. A deeper pipeline reduces the amount of time mutt  must  wait  for  the
              server,  and  can  make IMAP servers feel much more responsive. But not all servers
              correctly handle pipelined commands, so if you have problems you might want to  try
              setting this variable to 0.

              Note: Changes to this variable have no effect on open connections.

       imap_poll_timeout
              Type: number
              Default: 15

              This  variable  specifies the maximum amount of time in seconds that mutt will wait
              for a response when polling IMAP connections for new mail, before  timing  out  and
              closing the connection.  Set to 0 to disable timing out.

       imap_servernoise
              Type: boolean
              Default: yes

              When  set,  mutt  will  display  warning  messages  from  the  IMAP server as error
              messages.  Since  these  messages  are  often  harmless,  or   generated   due   to
              configuration  problems  on  the  server which are out of the users' hands, you may
              wish to suppress them at some point.

       imap_user
              Type: string
              Default: “”

              The name of the user whose mail you intend to access on the IMAP server.

              This variable defaults to your user name on the local machine.

       implicit_autoview
              Type: boolean
              Default: no

              If set to “yes”, mutt will look for a mailcap entry with the  “copiousoutput”  flag
              set  for  every MIME attachment it doesn't have an internal viewer defined for.  If
              such an entry is found, mutt will use the viewer defined in that entry  to  convert
              the body part to text form.

       include
              Type: quadoption
              Default: ask-yes

              Controls whether or not a copy of the message(s) you are replying to is included in
              your reply.

       include_onlyfirst
              Type: boolean
              Default: no

              Controls whether or not Mutt includes only the first attachment of the message  you
              are replying.

       indent_string
              Type: string
              Default: “> ”

              Specifies  the  string to prepend to each line of text quoted in a message to which
              you are replying.  You are strongly encouraged not to  change  this  value,  as  it
              tends to agitate the more fanatical netizens.

              The  value  of  this  option is ignored if $text_flowed is set, because the quoting
              mechanism is strictly defined for format=flowed.

              This option is a format string, please see the  description  of  $index_format  for
              supported printf(3)-style sequences.

       index_format
              Type: string
              Default: “%4C %Z %{%b %d} %-15.15L (%?l?%4l&%4c?) %s”

              This  variable  allows  you to customize the message index display to your personal
              taste.

              “Format strings” are similar to the strings used in the  C  function  printf(3)  to
              format  output  (see  the man page for more details).  For an explanation of the %?
              construct, see the $status_format description.  The following sequences are defined
              in Mutt:
              %a     address of the author
              %A     reply-to address (if present; otherwise: address of author)
              %b     filename of the original message folder (think mailbox)
              %B     the list to which the letter was sent, or else the folder name (%b).
              %c     number of characters (bytes) in the message
              %C     current message number
              %d     date  and  time  of  the  message  in  the  format specified by $date_format
                     converted to sender's time zone
              %D     date and time of  the  message  in  the  format  specified  by  $date_format
                     converted to the local time zone
              %e     current message number in thread
              %E     number of messages in current thread
              %f     sender (address + real name), either From: or Return-Path:
              %F     author name, or recipient name if the message is from you
              %H     spam attribute(s) of this message
              %i     message-id of the current message
              %l     number of lines in the message (does not work with maildir, mh, and possibly
                     IMAP folders)
              %L     If an address in the “To:” or “Cc:” header field matches an address  defined
                     by  the users “subscribe” command, this displays ”To <list-name>”, otherwise
                     the same as %F.
              %m     total number of message in the mailbox
              %M     number of hidden messages if the thread is collapsed.
              %N     message score
              %n     author's real name (or address if missing)
              %O     original save folder where mutt would formerly  have  stashed  the  message:
                     list name or recipient name if not sent to a list
              %P     progress  indicator  for  the  built-in pager (how much of the file has been
                     displayed)
              %r     comma separated list of “To:” recipients
              %R     comma separated list of “Cc:” recipients
              %s     subject of the message
              %S     single character status of the message (“N”/“O”/“D”/“d”/“!”/“r”/“*”)
              %t     “To:” field (recipients)
              %T     the appropriate character from the $to_chars string
              %u     user (login) name of the author
              %v     first name of the author, or the recipient if the message is from you
              %X     number of attachments (please see the  “attachments”  section  for  possible
                     speed effects)
              %y     “X-Label:” field, if present
              %Y     “X-Label:”  field,  if present, and (1) not at part of a thread tree, (2) at
                     the top of a thread, or (3) “X-Label:” is different from preceding message's
                     “X-Label:”.
              %Z     a  three  character  set  of  message  status flags.  the first character is
                     new/read/replied flags (“n”/“o”/“r”/“O”/“N”).   the  second  is  deleted  or
                     encryption   flags   (“D”/“d”/“S”/“P”/“s”/“K”).    the   third   is   either
                     tagged/flagged (“*”/“!”), or one of the characters listed in $to_chars.
              %{fmt} the date and time of the message is converted to  sender's  time  zone,  and
                     “fmt”  is  expanded  by  the  library  function  strftime(3); a leading bang
                     disables locales
              %[fmt] the date and time of the message is converted to the local  time  zone,  and
                     “fmt”  is  expanded  by  the  library  function  strftime(3); a leading bang
                     disables locales
              %(fmt) the local date and time when the message was received.  “fmt” is expanded by
                     the library function strftime(3); a leading bang disables locales
              %<fmt> the   current  local  time.  “fmt”  is  expanded  by  the  library  function
                     strftime(3); a leading bang disables locales.
              %>X    right justify the rest of the string and pad with character “X”
              %|X    pad to the end of the line with character “X”
              %*X    soft-fill with character “X” as pad

              “Soft-fill”  deserves  some  explanation:  Normal  right-justification  will  print
              everything  to  the  left  of the “%>”, displaying padding and whatever lies to the
              right only if there's room. By contrast, soft-fill gives priority to the right-hand
              side,  guaranteeing  space  to display it and showing padding only if there's still
              room. If necessary, soft-fill will eat text leftwards to make  room  for  rightward
              text.

              Note  that  these  expandos are supported in “save-hook”, “fcc-hook” and “fcc-save-
              hook”, too.

       ispell
              Type: path
              Default: “ispell”

              How to invoke ispell (GNU's spell-checking software).

       keep_flagged
              Type: boolean
              Default: no

              If set, read messages marked as flagged will not be moved from your  spool  mailbox
              to your $mbox mailbox, or as a result of a “mbox-hook” command.

       mail_check
              Type: number
              Default: 5

              This variable configures how often (in seconds) mutt should look for new mail. Also
              see the $timeout variable.

       mail_check_recent
              Type: boolean
              Default: yes

              When set, Mutt will only notify you about new mail that has been received since the
              last time you opened the mailbox.  When unset, Mutt will notify you if any new mail
              exists in the mailbox, regardless of whether you have visited it recently.

              When $mark_old is set, Mutt does not consider the mailbox to contain  new  mail  if
              only old messages exist.

       mail_check_stats
              Type: boolean
              Default: no

              When  set,  mutt  will periodically calculate message statistics of a mailbox while
              polling for new mail.  It will check for unread, flagged, and total message counts.
              Because this operation is more performance intensive, it defaults to unset, and has
              a separate option, $mail_check_stats_interval, to control how often to update these
              counts.

       mail_check_stats_interval
              Type: number
              Default: 60

              When $mail_check_stats is set, this variable configures how often (in seconds) mutt
              will update message counts.

       mailcap_path
              Type: string
              Default: “”

              This variable specifies which files to consult  when  attempting  to  display  MIME
              bodies not directly supported by Mutt.

       mailcap_sanitize
              Type: boolean
              Default: yes

              If  set,  mutt  will  restrict  possible  characters  in  mailcap  %  expandos to a
              well-defined set of safe characters.  This is the safe setting, but we are not sure
              it doesn't break some more advanced MIME stuff.

              DON'T CHANGE THIS SETTING UNLESS YOU ARE REALLY SURE WHAT YOU ARE DOING!

       maildir_header_cache_verify
              Type: boolean
              Default: yes

              Check  for  Maildir  unaware programs other than mutt having modified maildir files
              when the header cache is in use.  This incurs one stat(2) per  message  every  time
              the folder is opened (which can be very slow for NFS folders).

       maildir_trash
              Type: boolean
              Default: no

              If  set,  messages  marked  as  deleted will be saved with the maildir trashed flag
              instead of unlinked.  Note: this only applies to maildir-style mailboxes.   Setting
              it will have no effect on other mailbox types.

       maildir_check_cur
              Type: boolean
              Default: no

              If set, mutt will poll both the new and cur directories of a maildir folder for new
              messages.  This might be useful if other programs interacting with the folder (e.g.
              dovecot)  are  moving  new  messages  to the cur directory.  Note that setting this
              option may slow down polling for new messages in large folders, since mutt  has  to
              scan all cur messages.

       mark_macro_prefix
              Type: string
              Default: “'”

              Prefix  for macros created using mark-message.  A new macro automatically generated
              with <mark-message>a will be composed from this prefix and the letter a.

       mark_old
              Type: boolean
              Default: yes

              Controls whether or not mutt marks new unread messages as old if you exit a mailbox
              without  reading  them.   With  this  option set, the next time you start mutt, the
              messages will show up with an “O” next to them in the index menu,  indicating  that
              they are old.

       markers
              Type: boolean
              Default: yes

              Controls  the  display of wrapped lines in the internal pager. If set, a “+” marker
              is displayed at the beginning of wrapped lines.

              Also see the $smart_wrap variable.

       mask
              Type: regular expression
              Default: “!^\.[^.]”

              A regular expression used in the file  browser,  optionally  preceded  by  the  not
              operator  “!”.   Only files whose names match this mask will be shown. The match is
              always case-sensitive.

       mbox
              Type: path
              Default: “~/mbox”

              This specifies the folder into which read mail in your $spoolfile  folder  will  be
              appended.

              Also see the $move variable.

       mbox_type
              Type: folder magic
              Default: mbox

              The  default  mailbox  type  used  when creating new folders. May be any of “mbox”,
              “MMDF”, “MH” and “Maildir”. This is overridden by the -m command-line option.

       menu_context
              Type: number
              Default: 0

              This variable controls the number of lines of context that are given when scrolling
              through menus. (Similar to $pager_context.)

       menu_move_off
              Type: boolean
              Default: yes

              When  unset,  the bottom entry of menus will never scroll up past the bottom of the
              screen, unless there are less entries than lines.  When set, the bottom  entry  may
              move off the bottom.

       menu_scroll
              Type: boolean
              Default: no

              When  set,  menus  will  be  scrolled  up or down one line when you attempt to move
              across a screen boundary.  If unset, the screen is cleared and the next or previous
              page of the menu is displayed (useful for slow links to avoid many redraws).

       message_cache_clean
              Type: boolean
              Default: no

              If  set,  mutt  will  clean  out  obsolete  entries from the message cache when the
              mailbox is synchronized. You probably only want to set it every once  in  a  while,
              since it can be a little slow (especially for large folders).

       message_cachedir
              Type: path
              Default: “”

              Set  this  to a directory and mutt will cache copies of messages from your IMAP and
              POP servers here. You are free to remove entries at any time.

              When setting this variable to a directory, mutt needs to fetch every remote message
              only once and can perform regular expression searches as fast as for local folders.

              Also see the $message_cache_clean variable.

       message_format
              Type: string
              Default: “%s”

              This  is  the  string  displayed  in  the “attachment” menu for attachments of type
              message/rfc822.  For a full listing of defined  printf(3)-like  sequences  see  the
              section on $index_format.

       meta_key
              Type: boolean
              Default: no

              If set, forces Mutt to interpret keystrokes with the high bit (bit 8) set as if the
              user had pressed the Esc key and whatever key remains after  having  the  high  bit
              removed.   For example, if the key pressed has an ASCII value of 0xf8, then this is
              treated as if the user had pressed Esc then “x”.  This is  because  the  result  of
              removing the high bit from 0xf8 is 0x78, which is the ASCII character “x”.

       metoo
              Type: boolean
              Default: no

              If  unset,  Mutt  will  remove your address (see the “alternates” command) from the
              list of recipients when replying to a message.

       mh_purge
              Type: boolean
              Default: no

              When unset, mutt will mimic mh's behavior and rename deleted messages to ,<old file
              name>  in  mh  folders  instead of really deleting them. This leaves the message on
              disk but makes programs reading the folder ignore it. If the variable is  set,  the
              message files will simply be deleted.

              This option is similar to $maildir_trash for Maildir folders.

       mh_seq_flagged
              Type: string
              Default: “flagged”

              The name of the MH sequence used for flagged messages.

       mh_seq_replied
              Type: string
              Default: “replied”

              The name of the MH sequence used to tag replied messages.

       mh_seq_unseen
              Type: string
              Default: “unseen”

              The name of the MH sequence used for unseen messages.

       mime_forward
              Type: quadoption
              Default: no

              When  set,  the  message  you  are  forwarding  will  be  attached  as  a  separate
              message/rfc822 MIME part instead of included in the main body of the message.  This
              is  useful  for  forwarding  MIME  messages  so  the receiver can properly view the
              message as it was delivered to you. If you like to switch between MIME and not MIME
              from mail to mail, set this variable to “ask-no” or “ask-yes”.

              Also see $forward_decode and $mime_forward_decode.

       mime_forward_decode
              Type: boolean
              Default: no

              Controls  the  decoding  of complex MIME messages into text/plain when forwarding a
              message while $mime_forward is set. Otherwise $forward_decode is used instead.

       mime_forward_rest
              Type: quadoption
              Default: yes

              When forwarding multiple attachments of a MIME message from  the  attachment  menu,
              attachments  which cannot be decoded in a reasonable manner will be attached to the
              newly composed message if this option is set.

       mime_type_query_command
              Type: string
              Default: “”

              This specifies a command to run, to determine the mime type  of  a  new  attachment
              when  composing a message.  Unless $mime_type_query_first is set, this will only be
              run if the attachment's extension is not found in the mime.types file.

              The string may contain a “%s”,  which  will  be  substituted  with  the  attachment
              filename.    Mutt   will   add  quotes  around  the  string  substituted  for  “%s”
              automatically according to shell quoting rules, so you  should  avoid  adding  your
              own.   If  no “%s” is found in the string, Mutt will append the attachment filename
              to the end of the string.

              The command should output a single line containing the attachment's mime type.

              Suggested values are “xdg-mime query filetype” or “file -bi”.

       mime_type_query_first
              Type: boolean
              Default: no

              When set, the $mime_type_query_command will be run before the mime.types lookup.

       mix_entry_format
              Type: string
              Default: “%4n %c %-16s %a”

              This variable describes the format of  a  remailer  line  on  the  mixmaster  chain
              selection screen.  The following printf(3)-like sequences are supported:
              %n     The running number on the menu.
              %c     Remailer capabilities.
              %s     The remailer's short name.
              %a     The remailer's e-mail address.

       mixmaster
              Type: path
              Default: “mixmaster”

              This variable contains the path to the Mixmaster binary on your system.  It is used
              with various sets of parameters to gather the  list  of  known  remailers,  and  to
              finally send a message through the mixmaster chain.

       move
              Type: quadoption
              Default: no

              Controls  whether  or  not  Mutt will move read messages from your spool mailbox to
              your $mbox mailbox, or as a result of a “mbox-hook” command.

       narrow_tree
              Type: boolean
              Default: no

              This variable, when set, makes the thread tree narrower, allowing deeper threads to
              fit on the screen.

       net_inc
              Type: number
              Default: 10

              Operations  that  expect  to  transfer a large amount of data over the network will
              update their progress every $net_inc kilobytes.  If set to 0, no progress  messages
              will be displayed.

              See also $read_inc, $write_inc and $net_inc.

       new_mail_command
              Type: path
              Default: “”

              If  set,  Mutt  will  call  this  command after a new message is received.  See the
              $status_format documentation for  the  values  that  can  be  formatted  into  this
              command.

       pager
              Type: path
              Default: “builtin”

              This  variable  specifies  which  pager you would like to use to view messages. The
              value “builtin” means to use the built-in pager,  otherwise  this  variable  should
              specify the pathname of the external pager you would like to use.

              Using  an  external  pager  may  have some disadvantages: Additional keystrokes are
              necessary because you can't call mutt functions directly from the pager, and screen
              resizes  cause lines longer than the screen width to be badly formatted in the help
              menu.

       pager_context
              Type: number
              Default: 0

              This variable controls  the  number  of  lines  of  context  that  are  given  when
              displaying  the next or previous page in the internal pager.  By default, Mutt will
              display the line after the last one on the screen at the top of the  next  page  (0
              lines of context).

              This  variable  also  specifies  the amount of context given for search results. If
              positive, this many lines will be given before a match, if 0,  the  match  will  be
              top-aligned.

       pager_format
              Type: string
              Default: “-%Z- %C/%m: %-20.20n   %s%*  -- (%P)”

              This variable controls the format of the one-line message “status” displayed before
              each message in either the internal or an external pager.  The valid sequences  are
              listed in the $index_format section.

       pager_index_lines
              Type: number
              Default: 0

              Determines  the  number  of lines of a mini-index which is shown when in the pager.
              The current message, unless near the top or bottom of the folder, will  be  roughly
              one  third  of the way down this mini-index, giving the reader the context of a few
              messages before and after the message.  This is useful, for example,  to  determine
              how  many  messages  remain  to be read in the current thread.  One of the lines is
              reserved for the status bar from the index, so a setting of  6  will  only  show  5
              lines  of  the actual index.  A value of 0 results in no index being shown.  If the
              number of messages in the current folder is less than $pager_index_lines, then  the
              index will only use as many lines as it needs.

       pager_stop
              Type: boolean
              Default: no

              When  set, the internal-pager will not move to the next message when you are at the
              end of a message and invoke the <next-page> function.

       pgp_auto_decode
              Type: boolean
              Default: no

              If set, mutt  will  automatically  attempt  to  decrypt  traditional  PGP  messages
              whenever  the  user  performs  an  operation  which  ordinarily would result in the
              contents of the message being operated on.  For example, if  the  user  displays  a
              pgp-traditional  message  which  has  not  been  manually  checked with the <check-
              traditional-pgp>  function,  mutt  will  automatically  check   the   message   for
              traditional pgp.

       pgp_autoinline
              Type: boolean
              Default: no

              This  option  controls  whether  Mutt  generates old-style inline (traditional) PGP
              encrypted or signed messages under certain circumstances.  This can  be  overridden
              by  use  of  the pgp menu, when inline is not required.  The GPGME backend does not
              support this option.

              Note that Mutt might automatically use PGP/MIME for messages which consist of  more
              than  a  single  MIME  part.  Mutt can be configured to ask before sending PGP/MIME
              messages when inline (traditional) would not work.

              Also see the $pgp_mime_auto variable.

              Also note that using the old-style PGP message format is strongly deprecated.  (PGP
              only)

       pgp_check_exit
              Type: boolean
              Default: yes

              If  set,  mutt  will  check  the  exit  code  of the PGP subprocess when signing or
              encrypting.  A non-zero exit code means that the subprocess failed.  (PGP only)

       pgp_check_gpg_decrypt_status_fd
              Type: boolean
              Default: yes

              If set, mutt will check the status file descriptor output  of  $pgp_decrypt_command
              and  $pgp_decode_command  for  GnuPG status codes indicating successful decryption.
              This will check for the presence of DECRYPTION_OKAY, absence of  DECRYPTION_FAILED,
              and  that  all  PLAINTEXT  occurs  between  the BEGIN_DECRYPTION and END_DECRYPTION
              status codes.

              If   unset,   mutt   will   instead   match   the   status   fd   output    against
              $pgp_decryption_okay.  (PGP only)

       pgp_clearsign_command
              Type: string
              Default: “”

              This  format  is  used to create an old-style “clearsigned” PGP message.  Note that
              the use of this format is strongly deprecated.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_decode_command
              Type: string
              Default: “”

              This  format  strings  specifies  a command which is used to decode application/pgp
              attachments.

              The PGP command formats have their own set of printf(3)-like sequences:
              %p     Expands to PGPPASSFD=0 when a pass phrase is  needed,  to  an  empty  string
                     otherwise. Note: This may be used with a %? construct.
              %f     Expands to the name of a file containing a message.
              %s     Expands to the name of a file containing the signature part
                                of a multipart/signed attachment when verifying it.
              %a     The value of $pgp_sign_as if set, otherwise the value of $pgp_default_key.
              %r     One or more key IDs (or fingerprints if available).

              For  examples  on  how  to  configure these formats for the various versions of PGP
              which are floating around, see the pgp and gpg sample configuration  files  in  the
              samples/  subdirectory  which  has  been  installed  on  your  system alongside the
              documentation.  (PGP only)

       pgp_decrypt_command
              Type: string
              Default: “”

              This command is used to decrypt a PGP encrypted message.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_decryption_okay
              Type: regular expression
              Default: “”

              If  you  assign  text  to  this  variable,  then  an  encrypted PGP message is only
              considered successfully decrypted if the output from $pgp_decrypt_command  contains
              the  text.   This  is  used  to  protect  against a spoofed encrypted message, with
              multipart/encrypted headers but containing a block that is not actually  encrypted.
              (e.g. simply signed and ascii armored text).

              Note  that  if  $pgp_check_gpg_decrypt_status_fd  is set, this variable is ignored.
              (PGP only)

       pgp_default_key
              Type: string
              Default: “”

              This is the default key-pair to use for  PGP  operations.   It  will  be  used  for
              encryption (see $postpone_encrypt and $pgp_self_encrypt).

              It will also be used for signing unless $pgp_sign_as is set.

              The  (now deprecated) pgp_self_encrypt_as is an alias for this variable, and should
              no longer be used.  (PGP only)

       pgp_encrypt_only_command
              Type: string
              Default: “”

              This command is used to encrypt a body part without signing it.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_encrypt_sign_command
              Type: string
              Default: “”

              This command is used to both sign and encrypt a body part.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_entry_format
              Type: string
              Default: “%4n %t%f %4l/0x%k %-4a %2c %u”

              This variable allows you to customize the PGP key selection menu to  your  personal
              taste.   This  string  is  similar  to  $index_format,  but  has  its  own  set  of
              printf(3)-like sequences:
              %n     number
              %k     key id
              %u     user id
              %a     algorithm
              %l     key length
              %f     flags
              %c     capabilities
              %t     trust/validity of the key-uid association
              %[<s>] date of the key where <s> is an strftime(3) expression

              (PGP only)

       pgp_export_command
              Type: string
              Default: “”

              This command is used to export a public key from the user's key ring.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_getkeys_command
              Type: string
              Default: “”

              This command is invoked whenever Mutt needs to fetch the public key associated with
              an email address.  Of the sequences supported by  $pgp_decode_command,  %r  is  the
              only  printf(3)-like  sequence  used  with this format.  Note that in this case, %r
              expands to the email address, not the public key ID (the key ID is  unknown,  which
              is why Mutt is invoking this command).  (PGP only)

       pgp_good_sign
              Type: regular expression
              Default: “”

              If  you  assign  a  text  to this variable, then a PGP signature is only considered
              verified if the  output  from  $pgp_verify_command  contains  the  text.  Use  this
              variable  if  the  exit  code  from the command is 0 even for bad signatures.  (PGP
              only)

       pgp_ignore_subkeys
              Type: boolean
              Default: yes

              Setting this variable will cause Mutt  to  ignore  OpenPGP  subkeys.  Instead,  the
              principal  key  will  inherit the subkeys' capabilities.  Unset this if you want to
              play interesting key selection games.  (PGP only)

       pgp_import_command
              Type: string
              Default: “”

              This command is used to import a key from a message  into  the  user's  public  key
              ring.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_list_pubring_command
              Type: string
              Default: “”

              This command is used to list the public key ring's  contents.   The  output  format
              must be analogous to the one used by

              gpg --list-keys --with-colons --with-fingerprint

              This format is also generated by the pgpring utility which comes with mutt.

              Note:  gpg's  fixed-list-mode  option  should not be used.  It produces a different
              date format which may result in mutt showing incorrect key generation dates.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_list_secring_command
              Type: string
              Default: “”

              This  command  is  used  to list the secret key ring's contents.  The output format
              must be analogous to the one used by:

              gpg --list-keys --with-colons --with-fingerprint

              This format is also generated by the pgpring utility which comes with mutt.

              Note: gpg's fixed-list-mode option should not be used.   It  produces  a  different
              date format which may result in mutt showing incorrect key generation dates.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_long_ids
              Type: boolean
              Default: yes

              If set, use 64 bit PGP key IDs, if unset use the normal  32  bit  key  IDs.   NOTE:
              Internally,  Mutt  has  transitioned  to  using  fingerprints (or long key IDs as a
              fallback).  This option now only controls  the  display  of  key  IDs  in  the  key
              selection menu and a few other places.  (PGP only)

       pgp_mime_auto
              Type: quadoption
              Default: ask-yes

              This  option  controls  whether  Mutt  will  prompt you for automatically sending a
              (signed/encrypted) message using PGP/MIME when inline (traditional) fails (for  any
              reason).

              Also note that using the old-style PGP message format is strongly deprecated.  (PGP
              only)

       pgp_replyinline
              Type: boolean
              Default: no

              Setting this variable will cause  Mutt  to  always  attempt  to  create  an  inline
              (traditional)  message  when  replying  to  a message which is PGP encrypted/signed
              inline.  This can be overridden by  use  of  the  pgp  menu,  when  inline  is  not
              required.  This option does not automatically detect if the (replied-to) message is
              inline;  instead  it  relies  on  Mutt  internals  for  previously  checked/flagged
              messages.

              Note  that Mutt might automatically use PGP/MIME for messages which consist of more
              than a single MIME part.  Mutt can be configured to  ask  before  sending  PGP/MIME
              messages when inline (traditional) would not work.

              Also see the $pgp_mime_auto variable.

              Also note that using the old-style PGP message format is strongly deprecated.  (PGP
              only)

       pgp_retainable_sigs
              Type: boolean
              Default: no

              If set, signed and encrypted messages will consist of nested  multipart/signed  and
              multipart/encrypted body parts.

              This  is useful for applications like encrypted and signed mailing lists, where the
              outer  layer  (multipart/encrypted)  can  be  easily  removed,  while   the   inner
              multipart/signed part is retained.  (PGP only)

       pgp_self_encrypt
              Type: boolean
              Default: yes

              When  set,  PGP  encrypted  messages  will  also  be  encrypted  using  the  key in
              $pgp_default_key.  (PGP only)

       pgp_show_unusable
              Type: boolean
              Default: yes

              If set, mutt will display non-usable keys on the  PGP  key  selection  menu.   This
              includes  keys  which  have  been  revoked,  have  expired,  or have been marked as
              “disabled” by the user.  (PGP only)

       pgp_sign_as
              Type: string
              Default: “”

              If you have a different key pair to use for signing, you should  set  this  to  the
              signing  key.   Most  people  will  only  need  to  set  $pgp_default_key.   It  is
              recommended that you use the keyid form to  specify  your  key  (e.g.  0x00112233).
              (PGP only)

       pgp_sign_command
              Type: string
              Default: “”

              This  command  is  used to create the detached PGP signature for a multipart/signed
              PGP/MIME body part.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_sort_keys
              Type: sort order
              Default: address

              Specifies  how  the  entries  in  the  pgp menu are sorted. The following are legal
              values:
              address
                     sort alphabetically by user id
              keyid  sort alphabetically by key id
              date   sort by key creation date
              trust  sort by the trust of the key

              If you prefer reverse order of the above values, prefix it with  “reverse-”.   (PGP
              only)

       pgp_strict_enc
              Type: boolean
              Default: yes

              If   set,   Mutt   will   automatically   encode   PGP/MIME   signed   messages  as
              quoted-printable.  Please note that unsetting this variable may  lead  to  problems
              with  non-verifyable  PGP  signatures, so only change this if you know what you are
              doing.  (PGP only)

       pgp_timeout
              Type: number
              Default: 300

              The number of seconds after which a cached passphrase  will  expire  if  not  used.
              (PGP only)

       pgp_use_gpg_agent
              Type: boolean
              Default: no

              If  set,  mutt  will  use a possibly-running gpg-agent(1) process.  Note that as of
              version 2.1, GnuPG no longer exports GPG_AGENT_INFO, so mutt no longer verifies  if
              the agent is running.  (PGP only)

       pgp_verify_command
              Type: string
              Default: “”

              This command is used to verify PGP signatures.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pgp_verify_key_command
              Type: string
              Default: “”

              This command is used to verify key information from the key selection menu.

              This  is  a  format  string,  see  the  $pgp_decode_command  command  for  possible
              printf(3)-like sequences.  (PGP only)

       pipe_decode
              Type: boolean
              Default: no

              Used in connection with the <pipe-message> command.  When unset, Mutt will pipe the
              messages without any preprocessing. When set,  Mutt  will  weed  headers  and  will
              attempt to decode the messages first.

       pipe_sep
              Type: string
              Default: “\n”

              The  separator  to add between messages when piping a list of tagged messages to an
              external Unix command.

       pipe_split
              Type: boolean
              Default: no

              Used in connection with the <pipe-message>  function  following  <tag-prefix>.   If
              this variable is unset, when piping a list of tagged messages Mutt will concatenate
              the messages and will pipe them all concatenated.  When set,  Mutt  will  pipe  the
              messages  one  by  one.  In both cases the messages are piped in the current sorted
              order, and the $pipe_sep separator is added after each message.

       pop_auth_try_all
              Type: boolean
              Default: yes

              If set, Mutt will try all available authentication methods.  When unset, Mutt  will
              only  fall  back  to  other  authentication  methods  if  the  previous methods are
              unavailable. If a method is available  but  authentication  fails,  Mutt  will  not
              connect to the POP server.

       pop_authenticators
              Type: string
              Default: “”

              This is a colon-delimited list of authentication methods mutt may attempt to use to
              log in to an POP server, in the order mutt should try them.  Authentication methods
              are  either  “user”,  “apop”  or any SASL mechanism, e.g. “digest-md5”, “gssapi” or
              “cram-md5”.  This option is case-insensitive. If this option is unset (the default)
              mutt will try all available methods, in order from most-secure to least-secure.

              Example:

              set pop_authenticators=”digest-md5:apop:user”

       pop_checkinterval
              Type: number
              Default: 60

              This  variable  configures  how often (in seconds) mutt should look for new mail in
              the currently selected mailbox if it is a POP mailbox.

       pop_delete
              Type: quadoption
              Default: ask-no

              If set, Mutt will delete successfully downloaded messages from the POP server  when
              using  the <fetch-mail> function.  When unset, Mutt will download messages but also
              leave them on the POP server.

       pop_host
              Type: string
              Default: “”

              The name of your POP server for the <fetch-mail> function.  You can also specify an
              alternative port, username and password, i.e.:

              [pop[s]://][username[:password]@]popserver[:port]

              where “[...]” denotes an optional part.

       pop_last
              Type: boolean
              Default: no

              If this variable is set, mutt will try to use the “LAST” POP command for retrieving
              only unread messages from the POP server when using the <fetch-mail> function.

       pop_oauth_refresh_command
              Type: string
              Default: “”

              The command to run  to  generate  an  OAUTH  refresh  token  for  authorizing  your
              connection  to  your  POP  server.   This  command  will be run on every connection
              attempt that uses the OAUTHBEARER authentication mechanism.

       pop_pass
              Type: string
              Default: “”

              Specifies the password for your POP account.  If unset, Mutt will  prompt  you  for
              your password when you open a POP mailbox.

              Warning:  you  should only use this option when you are on a fairly secure machine,
              because the superuser can read your muttrc even if you are the  only  one  who  can
              read the file.

       pop_reconnect
              Type: quadoption
              Default: ask-yes

              Controls  whether  or  not  Mutt  will  try  to  reconnect to the POP server if the
              connection is lost.

       pop_user
              Type: string
              Default: “”

              Your login name on the POP server.

              This variable defaults to your user name on the local machine.

       post_indent_string
              Type: string
              Default: “”

              Similar to the $attribution variable,  Mutt  will  append  this  string  after  the
              inclusion of a message which is being replied to.

       postpone
              Type: quadoption
              Default: ask-yes

              Controls whether or not messages are saved in the $postponed mailbox when you elect
              not to send immediately.

              Also see the $recall variable.

       postponed
              Type: path
              Default: “~/postponed”

              Mutt allows you to indefinitely “postpone sending a message” which you are editing.
              When  you  choose  to postpone a message, Mutt saves it in the mailbox specified by
              this variable.

              Also see the $postpone variable.

       postpone_encrypt
              Type: boolean
              Default: no

              When set, postponed messages that are marked for encryption will be self-encrypted.
              Mutt  will  first  try  to encrypt using the value specified in $pgp_default_key or
              $smime_default_key.   If  those  are  not  set,  it   will   try   the   deprecated
              $postpone_encrypt_as.  (Crypto only)

       postpone_encrypt_as
              Type: string
              Default: “”

              This  is  a  deprecated  fall-back  variable  for  $postpone_encrypt.   Please  use
              $pgp_default_key or $smime_default_key.  (Crypto only)

       preconnect
              Type: string
              Default: “”

              If set, a shell command to be executed if mutt fails to establish a  connection  to
              the  server. This is useful for setting up secure connections, e.g. with ssh(1). If
              the command returns a  nonzero status, mutt gives up opening the server. Example:

              set preconnect=”ssh -f -q -L 1234:mailhost.net:143 mailhost.net \
              sleep 20 < /dev/null > /dev/null”

              Mailbox “foo” on “mailhost.net” can now be reached as “{localhost:1234}foo”.

              Note: For this example to work, you must be able to log in to  the  remote  machine
              without having to enter a password.

       print
              Type: quadoption
              Default: ask-no

              Controls  whether  or  not Mutt really prints messages.  This is set to “ask-no” by
              default, because some people accidentally hit “p” often.

       print_command
              Type: path
              Default: “lpr”

              This specifies the command pipe that should be used to print messages.

       print_decode
              Type: boolean
              Default: yes

              Used in connection with the <print-message> command.  If this option  is  set,  the
              message  is  decoded  before  it  is  passed  to  the external command specified by
              $print_command.  If this option is unset, no processing  will  be  applied  to  the
              message  when  printing it.  The latter setting may be useful if you are using some
              advanced printer filter which is  able  to  properly  format  e-mail  messages  for
              printing.

       print_split
              Type: boolean
              Default: no

              Used  in  connection  with the <print-message> command.  If this option is set, the
              command specified by $print_command is executed once for each message which  is  to
              be  printed.   If  this option is unset, the command specified by $print_command is
              executed only once, and all the messages are concatenated, with a form feed as  the
              message separator.

              Those who use the enscript(1) program's mail-printing mode will most likely want to
              set this option.

       prompt_after
              Type: boolean
              Default: yes

              If you use an external $pager, setting this variable will cause Mutt to prompt  you
              for  a  command  when  the pager exits rather than returning to the index menu.  If
              unset, Mutt will return to the index menu when the external pager exits.

       query_command
              Type: path
              Default: “”

              This specifies the command Mutt will use to make  external  address  queries.   The
              string may contain a “%s”, which will be substituted with the query string the user
              types.  Mutt will add quotes around the string substituted for  “%s”  automatically
              according  to shell quoting rules, so you should avoid adding your own.  If no “%s”
              is found in the string, Mutt will append the user's query to the end of the string.
              See “query” for more information.

       query_format
              Type: string
              Default: “%4c %t %-25.25a %-25.25n %?e?(%e)?”

              This   variable   describes   the   format  of  the  “query”  menu.  The  following
              printf(3)-style sequences are understood:
              %a     destination address
              %c     current entry number
              %e     extra information *
              %n     destination name
              %t     “*” if current entry is tagged, a space otherwise
              %>X    right justify the rest of the string and pad with “X”
              %|X    pad to the end of the line with “X”
              %*X    soft-fill with character “X” as pad

              For an explanation of “soft-fill”, see the $index_format documentation.

              * = can be optionally printed if nonzero, see the $status_format documentation.

       quit
              Type: quadoption
              Default: yes

              This variable controls whether “quit” and “exit” actually quit from mutt.  If  this
              option  is set, they do quit, if it is unset, they have no effect, and if it is set
              to ask-yes or ask-no, you are prompted for confirmation when you try to quit.

       quote_regexp
              Type: regular expression
              Default: “^([ \t]*[|>:}#])+”

              A regular expression used in the internal pager to  determine  quoted  sections  of
              text  in  the  body  of  a  message.  Quoted  text  may  be  filtered out using the
              <toggle-quoted> command, or colored according  to  the  “color  quoted”  family  of
              directives.

              Higher  levels  of  quoting  may  be  colored  differently (“color quoted1”, “color
              quoted2”, etc.). The quoting level is determined by  removing  the  last  character
              from  the  matched  text and recursively reapplying the regular expression until it
              fails to produce a match.

              Match detection may be overridden by the $smileys regular expression.

       read_inc
              Type: number
              Default: 10

              If set to a value greater than 0, Mutt will display which message it  is  currently
              on  when  reading  a  mailbox  or when performing search actions such as search and
              limit. The message is printed after this many messages have been read  or  searched
              (e.g.,  if  set to 25, Mutt will print a message when it is at message 25, and then
              again when it gets to message 50).  This variable is  meant  to  indicate  progress
              when reading or searching large mailboxes which may take some time.  When set to 0,
              only a single message will appear before the reading the mailbox.

              Also see the $write_inc, $net_inc and $time_inc variables and the “tuning”  section
              of the manual for performance considerations.

       read_only
              Type: boolean
              Default: no

              If set, all folders are opened in read-only mode.

       realname
              Type: string
              Default: “”

              This  variable specifies what “real” or “personal” name should be used when sending
              messages.

              By default, this is the GECOS field from /etc/passwd.  Note that this variable will
              not be used when the user has set a real name in the $from variable.

       recall
              Type: quadoption
              Default: ask-yes

              Controls  whether  or  not  Mutt  recalls  postponed  messages when composing a new
              message.

              Setting this variable to yes is not generally useful,  and  thus  not  recommended.
              Note  that  the  <recall-message> function can be used to manually recall postponed
              messages.

              Also see $postponed variable.

       record
              Type: path
              Default: “~/sent”

              This specifies the file into which  your  outgoing  messages  should  be  appended.
              (This  is  meant  as  the  primary  method  for saving a copy of your messages, but
              another way to do this is using the “my_hdr” command to create a “Bcc:” field  with
              your email address in it.)

              The value of $record is overridden by the $force_name and $save_name variables, and
              the “fcc-hook” command.

       reflow_space_quotes
              Type: boolean
              Default: yes

              This option controls how quotes from format=flowed messages are  displayed  in  the
              pager  and  when  replying  (with  $text_flowed unset).  When set, this option adds
              spaces after each level of quote marks, turning ”>>>foo” into ”> > > foo”.

              Note: If $reflow_text is unset, this option has no effect.  Also, this option  does
              not affect replies when $text_flowed is set.

       reflow_text
              Type: boolean
              Default: yes

              When  set,  Mutt will reformat paragraphs in text/plain parts marked format=flowed.
              If unset, Mutt will display paragraphs  unaltered  from  how  they  appear  in  the
              message body.  See RFC3676 for details on the format=flowed format.

              Also see $reflow_wrap, and $wrap.

       reflow_wrap
              Type: number
              Default: 78

              This  variable  controls  the  maximum paragraph width when reformatting text/plain
              parts when $reflow_text is set.  When the value is 0, paragraphs will be wrapped at
              the terminal's right margin.  A positive value sets the paragraph width relative to
              the left margin.  A negative value set the paragraph width relative  to  the  right
              margin.

              Also see $wrap.

       reply_regexp
              Type: regular expression
              Default: “^(re([\[0-9\]+])*|aw):[ \t]*”

              A  regular expression used to recognize reply messages when threading and replying.
              The default value corresponds to the English ”Re:” and the German ”Aw:”.

       reply_self
              Type: boolean
              Default: no

              If unset and you are replying to a message sent by you, Mutt will assume  that  you
              want to reply to the recipients of that message rather than to yourself.

              Also see the “alternates” command.

       reply_to
              Type: quadoption
              Default: ask-yes

              If  set,  when  replying  to  a  message,  Mutt  will use the address listed in the
              Reply-to: header as the recipient of the reply.  If unset, it will use the  address
              in  the  From:  header  field instead.  This option is useful for reading a mailing
              list that sets the Reply-To: header field to the list address and you want to  send
              a private message to the author of a message.

       resolve
              Type: boolean
              Default: yes

              When  set,  the  cursor  will  be  automatically  advanced  to  the  next (possibly
              undeleted) message  whenever  a  command  that  modifies  the  current  message  is
              executed.

       resume_draft_files
              Type: boolean
              Default: no

              If  set,  draft files (specified by -H on the command line) are processed similarly
              to when resuming a postponed message.  Recipients are not prompted for;  send-hooks
              are  not  evaluated;  no  alias  expansion  takes  place;  user-defined headers and
              signatures are not added to the message.

       resume_edited_draft_files
              Type: boolean
              Default: yes

              If set, draft files previously edited (via -E -H on the  command  line)  will  have
              $resume_draft_files automatically set when they are used as a draft file again.

              The  first  time a draft file is saved, mutt will add a header, X-Mutt-Resume-Draft
              to the saved file.  The next time the draft file is  read  in,  if  mutt  sees  the
              header, it will set $resume_draft_files.

              This  option  is designed to prevent multiple signatures, user-defined headers, and
              other processing effects from being made multiple times to the draft file.

       reverse_alias
              Type: boolean
              Default: no

              This variable controls whether or not Mutt will display the  “personal”  name  from
              your  aliases  in  the  index  menu if it finds an alias that matches the message's
              sender.  For example, if you have the following alias:

              alias juser abd30425@somewhere.net (Joe User)

              and then you receive mail which contains the following header:

              From: abd30425@somewhere.net

              It  would  be  displayed  in  the   index   menu   as   “Joe   User”   instead   of
              “abd30425@somewhere.net.”   This  is useful when the person's e-mail address is not
              human friendly.

       reverse_name
              Type: boolean
              Default: no

              It may sometimes arrive that you receive  mail  to  a  certain  machine,  move  the
              messages  to  another  machine, and reply to some the messages from there.  If this
              variable is set, the default From: line of the reply messages is  built  using  the
              address where you received the messages you are replying to if that address matches
              your “alternates”.  If the variable is unset, or the address  that  would  be  used
              doesn't  match  your  “alternates”,  the  From:  line  will use your address on the
              current machine.

              Also see the “alternates” command.

       reverse_realname
              Type: boolean
              Default: yes

              This variable fine-tunes the behavior of the $reverse_name  feature.   When  it  is
              set,  mutt  will  use  the address from incoming messages as-is, possibly including
              eventual real names.  When it is unset, mutt will override any such real names with
              the setting of the $realname variable.

       rfc2047_parameters
              Type: boolean
              Default: no

              When  this  variable  is set, Mutt will decode RFC2047-encoded MIME parameters. You
              want to set this variable when mutt suggests you to save attachments to files named
              like:

              =?iso-8859-1?Q?file=5F=E4=5F991116=2Ezip?=

              When  this  variable  is  set  interactively,  the change won't be active until you
              change folders.

              Note that this use of RFC2047's encoding is explicitly prohibited by the  standard,
              but nevertheless encountered in the wild.

              Also  note that setting this parameter will not have the effect that mutt generates
              this kind of  encoding.   Instead,  mutt  will  unconditionally  use  the  encoding
              specified in RFC2231.

       save_address
              Type: boolean
              Default: no

              If set, mutt will take the sender's full address when choosing a default folder for
              saving a mail. If $save_name or $force_name is set too, the selection  of  the  Fcc
              folder will be changed as well.

       save_empty
              Type: boolean
              Default: yes

              When  unset,  mailboxes which contain no saved messages will be removed when closed
              (the exception is $spoolfile which is never removed).  If set, mailboxes are  never
              removed.

              Note:  This  only  applies  to  mbox  and MMDF folders, Mutt does not delete MH and
              Maildir directories.

       save_history
              Type: number
              Default: 0

              This variable controls the  size  of  the  history  (per  category)  saved  in  the
              $history_file file.

       save_name
              Type: boolean
              Default: no

              This  variable  controls  how  copies  of outgoing messages are saved.  When set, a
              check is made to see if a mailbox specified by the recipient address  exists  (this
              is  done by searching for a mailbox in the $folder directory with the username part
              of the recipient address).  If the mailbox exists, the  outgoing  message  will  be
              saved to that mailbox, otherwise the message is saved to the $record mailbox.

              Also see the $force_name variable.

       score
              Type: boolean
              Default: yes

              When  this  variable  is  unset,  scoring  is  turned  off.   This can be useful to
              selectively disable scoring for certain folders  when  the  $score_threshold_delete
              variable and related are used.

       score_threshold_delete
              Type: number
              Default: -1

              Messages  which have been assigned a score equal to or lower than the value of this
              variable are automatically marked for deletion by  mutt.   Since  mutt  scores  are
              always  greater  than  or  equal to zero, the default setting of this variable will
              never mark a message for deletion.

       score_threshold_flag
              Type: number
              Default: 9999

              Messages which have been assigned a score greater than or equal to this  variable's
              value are automatically marked ”flagged”.

       score_threshold_read
              Type: number
              Default: -1

              Messages  which have been assigned a score equal to or lower than the value of this
              variable are automatically marked as read by mutt.  Since mutt  scores  are  always
              greater than or equal to zero, the default setting of this variable will never mark
              a message read.

       search_context
              Type: number
              Default: 0

              For the pager, this variable specifies the number  of  lines  shown  before  search
              results. By default, search results will be top-aligned.

       send_charset
              Type: string
              Default: “us-ascii:iso-8859-1:utf-8”

              A  colon-delimited  list of character sets for outgoing messages. Mutt will use the
              first character set into which the text can be converted exactly.  If your $charset
              is  not  “iso-8859-1” and recipients may not understand “UTF-8”, it is advisable to
              include in the list an appropriate widely used  standard  character  set  (such  as
              “iso-8859-2”, “koi8-r” or “iso-2022-jp”) either instead of or after “iso-8859-1”.

              In  case the text cannot be converted into one of these exactly, mutt uses $charset
              as a fallback.

       sendmail
              Type: path
              Default: “/usr/sbin/sendmail -oem -oi”

              Specifies the program and arguments used  to  deliver  mail  sent  by  Mutt.   Mutt
              expects  that  the  specified  program interprets additional arguments as recipient
              addresses.  Mutt appends all recipients after adding a -- delimiter (if not already
              present).    Additional  flags,  such  as  for  $use_8bitmime,  $use_envelope_from,
              $dsn_notify, or $dsn_return will be added before the delimiter.

       sendmail_wait
              Type: number
              Default: 0

              Specifies the number of seconds to wait for the $sendmail process to finish  before
              giving up and putting delivery in the background.

              Mutt interprets the value of this variable as follows:
              >0     number of seconds to wait for sendmail to finish before continuing
              0      wait forever for sendmail to finish
              <0     always put sendmail in the background without waiting

              Note that if you specify a value other than 0, the output of the child process will
              be put in a temporary file.  If there is some error, you will  be  informed  as  to
              where to find the output.

       shell
              Type: path
              Default: “”

              Command  to  use when spawning a subshell.  By default, the user's login shell from
              /etc/passwd is used.

       sidebar_delim_chars
              Type: string
              Default: “/.”

              This contains the list of characters which  you  would  like  to  treat  as  folder
              separators for displaying paths in the sidebar.

              Local mail is often arranged in directories: `dir1/dir2/mailbox'.

              set sidebar_delim_chars='/'

              IMAP mailboxes are often named: `folder1.folder2.mailbox'.

              set sidebar_delim_chars='.'

              See also: $sidebar_short_path, $sidebar_folder_indent, $sidebar_indent_string.

       sidebar_divider_char
              Type: string
              Default: “|”

              This  specifies  the  characters to be drawn between the sidebar (when visible) and
              the other Mutt panels. ASCII and Unicode line-drawing characters are supported.

       sidebar_folder_indent
              Type: boolean
              Default: no

              Set this to indent mailboxes in the sidebar.

              See also: $sidebar_short_path, $sidebar_indent_string, $sidebar_delim_chars.

       sidebar_format
              Type: string
              Default: “%B%*  %n”

              This variable allows you to customize the sidebar display. This string  is  similar
              to $index_format, but has its own set of printf(3)-like sequences:
              %B     Name of the mailbox
              %S     * Size of mailbox (total number of messages)
              %N     * Number of unread messages in the mailbox
              %n     N if mailbox has new mail, blank otherwise
              %F     * Number of Flagged messages in the mailbox
              %!     “!”  :  one  flagged  message; “!!” : two flagged messages; “n!” : n flagged
                     messages (for n > 2).  Otherwise prints nothing.
              %d     * @ Number of deleted messages
              %L     * @ Number of messages after limiting
              %t     * @ Number of tagged messages
              %>X    right justify the rest of the string and pad with “X”
              %|X    pad to the end of the line with “X”
              %*X    soft-fill with character “X” as pad

              * = Can be optionally printed if nonzero @ = Only applicable to the current folder

              In order to use %S, %N, %F, and %!, $mail_check_stats must be set.  When thus  set,
              a suggested value for this option is ”%B%?F? [%F]?%* %?N?%N/?%S”.

       sidebar_indent_string
              Type: string
              Default: “  ”

              This  specifies  the  string  that  is used to indent mailboxes in the sidebar.  It
              defaults to two spaces.

              See also: $sidebar_short_path, $sidebar_folder_indent, $sidebar_delim_chars.

       sidebar_new_mail_only
              Type: boolean
              Default: no

              When set, the sidebar will only display mailboxes containing new, or flagged, mail.

              See also: sidebar_whitelist.

       sidebar_next_new_wrap
              Type: boolean
              Default: no

              When set, the <sidebar-next-new> command will not stop and the end of the  list  of
              mailboxes,  but  wrap  around  to  the beginning. The <sidebar-prev-new> command is
              similarly affected, wrapping around to the end of the list.

       sidebar_short_path
              Type: boolean
              Default: no

              By default the sidebar will show  the  mailbox's  path,  relative  to  the  $folder
              variable.  Setting  sidebar_shortpath=yes  will  shorten  the names relative to the
              previous name. Here's an example:
              shortpath=no
                     shortpath=yes shortpath=yes, folderindent=yes, indentstr=”..”
              fruit  fruit fruit
              fruit.apple
                     apple ..apple
              fruit.banana
                     banana ..banana
              fruit.cherry
                     cherry ..cherry

              See also: $sidebar_delim_chars, $sidebar_folder_indent, $sidebar_indent_string.

       sidebar_sort_method
              Type: sort order
              Default: order

              Specifies how to sort entries in the file browser.  By  default,  the  entries  are
              sorted alphabetically.  Valid values:
              ‐ alpha (alphabetically)
              ‐ count (all message count)
              ‐ flagged (flagged message count)
              ‐ name (alphabetically)
              ‐ new (unread message count)
              ‐ path (alphabetically)
              ‐ unread (unread message count)
              ‐ unsorted

              You  may  optionally  use  the  “reverse-”  prefix to specify reverse sorting order
              (example: “set sort_browser=reverse-date”).

       sidebar_visible
              Type: boolean
              Default: no

              This specifies whether or not to show sidebar. The sidebar shows a list of all your
              mailboxes.

              See also: $sidebar_format, $sidebar_width

       sidebar_width
              Type: number
              Default: 30

              This  controls  the  width  of the sidebar.  It is measured in screen columns.  For
              example:  sidebar_width=20  could  display  20  ASCII  characters,  or  10  Chinese
              characters.

       sig_dashes
              Type: boolean
              Default: yes

              If  set,  a line containing “-- ” (note the trailing space) will be inserted before
              your $signature.  It is strongly recommended  that  you  not  unset  this  variable
              unless your signature contains just your name.  The reason for this is because many
              software packages use “-- \n” to detect your signature.  For example, Mutt has  the
              ability to highlight the signature in a different color in the built-in pager.

       sig_on_top
              Type: boolean
              Default: no

              If  set, the signature will be included before any quoted or forwarded text.  It is
              strongly recommended that you do not set this variable unless you really know  what
              you are doing, and are prepared to take some heat from netiquette guardians.

       signature
              Type: path
              Default: “~/.signature”

              Specifies  the  filename  of  your  signature,  which  is  appended to all outgoing
              messages.   If the filename ends with a pipe (“|”), it is assumed that filename  is
              a shell command and input should be read from its standard output.

       simple_search
              Type: string
              Default: “~f %s | ~s %s”

              Specifies  how  Mutt  should  expand a simple search into a real search pattern.  A
              simple search is one that does not contain any of the “~” pattern  operators.   See
              “patterns” for more information on search patterns.

              For  example,  if  you  simply  type  “joe”  at a search or limit prompt, Mutt will
              automatically expand it to the value specified by this variable by  replacing  “%s”
              with  the  supplied string.  For the default value, “joe” would be expanded to: “~f
              joe | ~s joe”.

       sleep_time
              Type: number
              Default: 1

              Specifies time,  in  seconds,  to  pause  while  displaying  certain  informational
              messages,  while moving from folder to folder and after expunging messages from the
              current folder.  The default is to pause one second, so a value of  zero  for  this
              option suppresses the pause.

       smart_wrap
              Type: boolean
              Default: yes

              Controls  the  display of lines longer than the screen width in the internal pager.
              If set, long lines are wrapped at a word boundary.   If  unset,  lines  are  simply
              wrapped at the screen edge. Also see the $markers variable.

       smileys
              Type: regular expression
              Default: “(>From )|(:[-^]?[][)(><}{|/DP])”

              The pager uses this variable to catch some common false positives of $quote_regexp,
              most notably smileys and not consider  a  line  quoted  text  if  it  also  matches
              $smileys. This mostly happens at the beginning of a line.

       smime_ask_cert_label
              Type: boolean
              Default: yes

              This  flag controls whether you want to be asked to enter a label for a certificate
              about to be added to the database or not. It is set by default.  (S/MIME only)

       smime_ca_location
              Type: path
              Default: “”

              This variable contains the name of either a directory, or  a  file  which  contains
              trusted certificates for use with OpenSSL.  (S/MIME only)

       smime_certificates
              Type: path
              Default: “”

              Since  for  S/MIME  there  is  no  pubring/secring  as with PGP, mutt has to handle
              storage and retrieval of keys by itself. This is very basic right now, and keys and
              certificates  are stored in two different directories, both named as the hash-value
              retrieved from OpenSSL. There is an index file which contains mailbox-address keyid
              pairs,  and which can be manually edited. This option points to the location of the
              certificates.  (S/MIME only)

       smime_decrypt_command
              Type: string
              Default: “”

              This   format   string   specifies   a   command   which   is   used   to   decrypt
              application/x-pkcs7-mime attachments.

              The  OpenSSL command formats have their own set of printf(3)-like sequences similar
              to PGP's:
              %f     Expands to the name of a file containing a message.
              %s     Expands to the name of a file containing the signature part
                                of a multipart/signed attachment when verifying it.
              %k     The key-pair specified with $smime_default_key
              %c     One or more certificate IDs.
              %a     The algorithm used for encryption.
              %d     The message digest algorithm specified with $smime_sign_digest_alg.
              %C     CA location:  Depending on whether $smime_ca_location
                                points to a directory or file, this expands to
                                “-CApath $smime_ca_location” or “-CAfile $smime_ca_location”.

              For examples on how to configure these formats, see the smime.rc  in  the  samples/
              subdirectory  which  has been installed on your system alongside the documentation.
              (S/MIME only)

       smime_decrypt_use_default_key
              Type: boolean
              Default: yes

              If set (default) this tells mutt to use the default key for decryption.  Otherwise,
              if   managing   multiple   certificate-key-pairs,   mutt   will   try  to  use  the
              mailbox-address to determine the key to use. It will ask you to supply a key, if it
              can't find one.  (S/MIME only)

       smime_default_key
              Type: string
              Default: “”

              This  is  the default key-pair to use for S/MIME operations, and must be set to the
              keyid (the hash-value that OpenSSL generates) to work properly.

              It will be used for encryption (see $postpone_encrypt and $smime_self_encrypt).

              It will be used for decryption unless $smime_decrypt_use_default_key is unset.

              It will also be used for signing unless $smime_sign_as is set.

              The (now deprecated) smime_self_encrypt_as is  an  alias  for  this  variable,  and
              should no longer be used.  (S/MIME only)

       smime_encrypt_command
              Type: string
              Default: “”

              This command is used to create encrypted S/MIME messages.

              This  is  a  format  string,  see  the  $smime_decrypt_command command for possible
              printf(3)-like sequences.  (S/MIME only)

       smime_encrypt_with
              Type: string
              Default: “aes256”

              This sets the algorithm that should be used  for  encryption.   Valid  choices  are
              “aes128”,   “aes192”,  “aes256”,  “des”,  “des3”,  “rc2-40”,  “rc2-64”,  “rc2-128”.
              (S/MIME only)

       smime_get_cert_command
              Type: string
              Default: “”

              This command is used to extract X509 certificates from a PKCS7 structure.

              This is a format  string,  see  the  $smime_decrypt_command  command  for  possible
              printf(3)-like sequences.  (S/MIME only)

       smime_get_cert_email_command
              Type: string
              Default: “”

              This  command  is  used  to  extract  the  mail  address(es)  used for storing X509
              certificates, and for verification purposes (to check whether the  certificate  was
              issued for the sender's mailbox).

              This  is  a  format  string,  see  the  $smime_decrypt_command command for possible
              printf(3)-like sequences.  (S/MIME only)

       smime_get_signer_cert_command
              Type: string
              Default: “”

              This command is used to extract only the signers X509  certificate  from  a  S/MIME
              signature,  so that the certificate's owner may get compared to the email's “From:”
              field.

              This is a format  string,  see  the  $smime_decrypt_command  command  for  possible
              printf(3)-like sequences.  (S/MIME only)

       smime_import_cert_command
              Type: string
              Default: “”

              This command is used to import a certificate via smime_keys.

              This  is  a  format  string,  see  the  $smime_decrypt_command command for possible
              printf(3)-like sequences.  (S/MIME only)

       smime_is_default
              Type: boolean
              Default: no

              The default behavior of mutt is to use PGP on all auto-sign/encryption  operations.
              To  override  and  to  use  OpenSSL instead this must be set.  However, this has no
              effect while replying, since mutt will automatically select  the  same  application
              that  was  used to sign/encrypt the original message.  (Note that this variable can
              be overridden by unsetting $crypt_autosmime.)  (S/MIME only)

       smime_keys
              Type: path
              Default: “”

              Since for S/MIME there is no pubring/secring  as  with  PGP,  mutt  has  to  handle
              storage  and  retrieval  of keys/certs by itself. This is very basic right now, and
              stores keys and certificates in  two  different  directories,  both  named  as  the
              hash-value   retrieved  from  OpenSSL.  There  is  an  index  file  which  contains
              mailbox-address keyid pair, and which can be manually edited. This option points to
              the location of the private keys.  (S/MIME only)

       smime_pk7out_command
              Type: string
              Default: “”

              This  command is used to extract PKCS7 structures of S/MIME signatures, in order to
              extract the public X509 certificate(s).

              This is a format  string,  see  the  $smime_decrypt_command  command  for  possible
              printf(3)-like sequences.  (S/MIME only)

       smime_self_encrypt
              Type: boolean
              Default: yes

              When set, S/MIME encrypted messages will also be encrypted using the certificate in
              $smime_default_key.  (S/MIME only)

       smime_sign_as
              Type: string
              Default: “”

              If you have a separate key to use for signing, you should set this to  the  signing
              key. Most people will only need to set $smime_default_key.  (S/MIME only)

       smime_sign_command
              Type: string
              Default: “”

              This  command  is used to created S/MIME signatures of type multipart/signed, which
              can be read by all mail clients.

              This is a format  string,  see  the  $smime_decrypt_command  command  for  possible
              printf(3)-like  sequences.   NOTE: %c and %k will default to $smime_sign_as if set,
              otherwise $smime_default_key.  (S/MIME only)

       smime_sign_digest_alg
              Type: string
              Default: “sha256”

              This sets the algorithm that should be  used  for  the  signature  message  digest.
              Valid  choices  are “md5”, “sha1”, “sha224”, “sha256”, “sha384”, “sha512”.  (S/MIME
              only)

       smime_sign_opaque_command
              Type: string
              Default: “”

              This   command    is    used    to    created    S/MIME    signatures    of    type
              application/x-pkcs7-signature, which can only be handled by mail clients supporting
              the S/MIME extension.

              This is a format  string,  see  the  $smime_decrypt_command  command  for  possible
              printf(3)-like sequences.  (S/MIME only)

       smime_timeout
              Type: number
              Default: 300

              The  number  of  seconds  after  which a cached passphrase will expire if not used.
              (S/MIME only)

       smime_verify_command
              Type: string
              Default: “”

              This command is used to verify S/MIME signatures of type multipart/signed.

              This is a format  string,  see  the  $smime_decrypt_command  command  for  possible
              printf(3)-like sequences.  (S/MIME only)

       smime_verify_opaque_command
              Type: string
              Default: “”

              This command is used to verify S/MIME signatures of type application/x-pkcs7-mime.

              This  is  a  format  string,  see  the  $smime_decrypt_command command for possible
              printf(3)-like sequences.  (S/MIME only)

       smtp_authenticators
              Type: string
              Default: “”

              This is a colon-delimited list of authentication methods mutt may attempt to use to
              log  in  to  an  SMTP  server,  in  the order mutt should try them.  Authentication
              methods are any SASL mechanism, e.g.  “digest-md5”, “gssapi” or  “cram-md5”.   This
              option  is  case-insensitive.  If  it  is  “unset”  (the default) mutt will try all
              available methods, in order from most-secure to least-secure.

              Example:

              set smtp_authenticators=”digest-md5:cram-md5”

       smtp_oauth_refresh_command
              Type: string
              Default: “”

              The command to run  to  generate  an  OAUTH  refresh  token  for  authorizing  your
              connection  to  your  SMTP  server.   This  command will be run on every connection
              attempt that uses the OAUTHBEARER authentication mechanism.

       smtp_pass
              Type: string
              Default: “”

              Specifies the password for your SMTP account.  If unset, Mutt will prompt  you  for
              your  password  when you first send mail via SMTP.  See $smtp_url to configure mutt
              to send mail via SMTP.

              Warning: you should only use this option when you are on a fairly  secure  machine,
              because  the  superuser  can  read your muttrc even if you are the only one who can
              read the file.

       smtp_url
              Type: string
              Default: “”

              Defines the SMTP smarthost where sent messages should relayed  for  delivery.  This
              should take the form of an SMTP URL, e.g.:

              smtp[s]://[user[:pass]@]host[:port]

              where  “[...]” denotes an optional part.  Setting this variable overrides the value
              of the $sendmail variable.

       sort
              Type: sort order
              Default: date

              Specifies how to sort messages in the “index” menu.  Valid values are:
              ‐ date or date-sent
              ‐ date-received
              ‐ from
              ‐ mailbox-order (unsorted)
              ‐ score
              ‐ size
              ‐ spam
              ‐ subject
              ‐ threads
              ‐ to

              You may optionally use the “reverse-”  prefix  to  specify  reverse  sorting  order
              (example: “set sort=reverse-date-sent”).

       sort_alias
              Type: sort order
              Default: alias

              Specifies  how the entries in the “alias” menu are sorted.  The following are legal
              values:
              ‐ address (sort alphabetically by email address)
              ‐ alias (sort alphabetically by alias name)
              ‐ unsorted (leave in order specified in .muttrc)

       sort_aux
              Type: sort order
              Default: date

              When sorting by threads, this variable controls how threads are sorted in  relation
              to other threads, and how the branches of the thread trees are sorted.  This can be
              set to any value that $sort can, except “threads” (in that case, mutt will just use
              “date-sent”).   You  can  also  specify  the  “last-”  prefix  in  addition  to the
              “reverse-” prefix, but “last-” must come  after  “reverse-”.   The  “last-”  prefix
              causes messages to be sorted against its siblings by which has the last descendant,
              using the rest of $sort_aux as an ordering.  For instance,

              set sort_aux=last-date-received

              would mean that if a new message is received in a thread, that thread  becomes  the
              last one displayed (or the first, if you have “set sort=reverse-threads”.)

              Note:  For reversed $sort order $sort_aux is reversed again (which is not the right
              thing to do, but kept to not break any existing configuration setting).

       sort_browser
              Type: sort order
              Default: alpha

              Specifies how to sort entries in the file browser.  By  default,  the  entries  are
              sorted alphabetically.  Valid values:
              ‐ alpha (alphabetically)
              ‐ count
              ‐ date
              ‐ size
              ‐ unread
              ‐ unsorted

              You  may  optionally  use  the  “reverse-”  prefix to specify reverse sorting order
              (example: “set sort_browser=reverse-date”).

       sort_re
              Type: boolean
              Default: yes

              This variable is only useful when sorting by threads  with  $strict_threads  unset.
              In  that  case,  it  changes the heuristic mutt uses to thread messages by subject.
              With $sort_re set, mutt will only attach a message as the child of another  message
              by subject if the subject of the child message starts with a substring matching the
              setting of $reply_regexp.  With  $sort_re  unset,  mutt  will  attach  the  message
              whether  or  not  this  is the case, as long as the non-$reply_regexp parts of both
              messages are identical.

       spam_separator
              Type: string
              Default: “,”

              This variable controls what happens when multiple  spam  headers  are  matched:  if
              unset,  each  successive  header  will overwrite any previous matches value for the
              spam label. If set, each successive match will append to the previous,  using  this
              variable's value as a separator.

       spoolfile
              Type: path
              Default: “”

              If  your spool mailbox is in a non-default place where Mutt cannot find it, you can
              specify its location with this variable.  Mutt will initially set this variable  to
              the value of the environment variable $MAIL or $MAILDIR if either is defined.

       ssl_ca_certificates_file
              Type: path
              Default: “”

              This  variable  specifies  a  file  containing trusted CA certificates.  Any server
              certificate that is signed with one of these CA certificates is also  automatically
              accepted. (GnuTLS only)

              Example:

              set ssl_ca_certificates_file=/etc/ssl/certs/ca-certificates.crt

       ssl_client_cert
              Type: path
              Default: “”

              The file containing a client certificate and its associated private key.

       ssl_force_tls
              Type: boolean
              Default: no

              If  this  variable is set, Mutt will require that all connections to remote servers
              be encrypted. Furthermore it will attempt to negotiate TLS even if the server  does
              not advertise the capability, since it would otherwise have to abort the connection
              anyway. This option supersedes $ssl_starttls.

       ssl_min_dh_prime_bits
              Type: number
              Default: 0

              This variable specifies the minimum acceptable prime size (in bits) for use in  any
              Diffie-Hellman  key  exchange.  A  value  of 0 will use the default from the GNUTLS
              library. (GnuTLS only)

       ssl_starttls
              Type: quadoption
              Default: yes

              If set (the default), mutt will attempt to use STARTTLS on servers advertising  the
              capability.  When  unset,  mutt  will not attempt to use STARTTLS regardless of the
              server's capabilities.

       ssl_use_sslv2
              Type: boolean
              Default: no

              This variable specifies whether to attempt to use SSLv2 in the  SSL  authentication
              process.  Note  that  SSLv2 and SSLv3 are now considered fundamentally insecure and
              are no longer recommended.  (OpenSSL only)

       ssl_use_sslv3
              Type: boolean
              Default: no

              This variable specifies whether to attempt to use SSLv3 in the  SSL  authentication
              process.  Note  that  SSLv2 and SSLv3 are now considered fundamentally insecure and
              are no longer recommended.

       ssl_use_tlsv1
              Type: boolean
              Default: yes

              This variable specifies whether to attempt to use TLSv1.0 in the SSL authentication
              process.

       ssl_use_tlsv1_1
              Type: boolean
              Default: yes

              This variable specifies whether to attempt to use TLSv1.1 in the SSL authentication
              process.

       ssl_use_tlsv1_2
              Type: boolean
              Default: yes

              This variable specifies whether to attempt to use TLSv1.2 in the SSL authentication
              process.

       ssl_usesystemcerts
              Type: boolean
              Default: yes

              If  set  to yes, mutt will use CA certificates in the system-wide certificate store
              when checking if a server certificate is signed by a trusted CA. (OpenSSL only)

       ssl_verify_dates
              Type: boolean
              Default: yes

              If set (the default), mutt will not automatically accept a server certificate  that
              is  either  not  yet  valid  or  already  expired.  You  should only unset this for
              particular known hosts, using the <account-hook> function.

       ssl_verify_host
              Type: boolean
              Default: yes

              If set (the default), mutt will not automatically accept a server certificate whose
              host  name  does  not match the host used in your folder URL. You should only unset
              this for particular known hosts, using the <account-hook> function.

       ssl_verify_partial_chains
              Type: boolean
              Default: no

              This option should not be changed from the default unless you understand  what  you
              are doing.

              Setting this variable to yes will permit verifying partial certification chains, i.
              e. a certificate chain where not the root, but an intermediate certificate  CA,  or
              the  host  certificate,  are marked trusted (in $certificate_file), without marking
              the root signing CA as trusted.

              (OpenSSL 1.0.2b and newer only).

       ssl_ciphers
              Type: string
              Default: “”

              Contains a colon-seperated list of ciphers to use when using SSL.  For OpenSSL, see
              ciphers(1) for the syntax of the string.

              For  GnuTLS,  this  option  will  be  used in place of ”NORMAL” at the start of the
              priority string.  See gnutls_priority_init(3) for  the  syntax  and  more  details.
              (Note: GnuTLS version 2.1.7 or higher is required.)

       status_chars
              Type: string
              Default: “-*%A”

              Controls  the  characters  used  by the “%r” indicator in $status_format. The first
              character is used when the mailbox is  unchanged.  The  second  is  used  when  the
              mailbox  has  been changed, and it needs to be resynchronized. The third is used if
              the mailbox is in read-only mode, or if  the  mailbox  will  not  be  written  when
              exiting that mailbox (You can toggle whether to write changes to a mailbox with the
              <toggle-write> operation, bound by default to “%”). The fourth is used to  indicate
              that the current folder has been opened in attach- message mode (Certain operations
              like composing a new mail, replying, forwarding, etc. are  not  permitted  in  this
              mode).

       status_format
              Type: string
              Default: “-%r-Mutt: %f [Msgs:%?M?%M/?%m%?n? New:%n?%?o? Old:%o?%?d? Del:%d?%?F? Flag:%F?%?t? Tag:%t?%?p? Post:%p?%?b? Inc:%b?%?l? %l?]---(%s/%S)-%>-(%P)---”

              Controls  the format of the status line displayed in the “index” menu.  This string
              is similar to $index_format, but has its own set of printf(3)-like sequences:
              %b     number of mailboxes with new mail *
              %d     number of deleted messages *
              %f     the full pathname of the current mailbox
              %F     number of flagged messages *
              %h     local hostname
              %l     size (in bytes) of the current mailbox *
              %L     size (in bytes) of the messages shown (i.e., which match the current  limit)
                     *
              %m     the number of messages in the mailbox *
              %M     the number of messages shown (i.e., which match the current limit) *
              %n     number of new messages in the mailbox *
              %o     number of old unread messages *
              %p     number of postponed messages *
              %P     percentage of the way through the index
              %r     modified/read-only/won't-write/attach-message    indicator,   according   to
                     $status_chars
              %R     number of read messages *
              %s     current sorting mode ($sort)
              %S     current aux sorting method ($sort_aux)
              %t     number of tagged messages *
              %u     number of unread messages *
              %v     Mutt version string
              %V     currently active limit pattern, if any *
              %>X    right justify the rest of the string and pad with “X”
              %|X    pad to the end of the line with “X”
              %*X    soft-fill with character “X” as pad

              For an explanation of “soft-fill”, see the $index_format documentation.

              * = can be optionally printed if nonzero

              Some of the above sequences can be used to optionally print a string if their value
              is  nonzero.   For example, you may only want to see the number of flagged messages
              if such messages exist, since zero is not particularly meaningful.   To  optionally
              print  a  string  based upon one of the above sequences, the following construct is
              used:

              %?<sequence_char>?<optional_string>?

              where sequence_char is a character from the table above, and optional_string is the
              string  you  would  like  printed if sequence_char is nonzero.  optional_string may
              contain other sequences as well as normal text,  but  you  may  not  nest  optional
              strings.

              Here  is an example illustrating how to optionally print the number of new messages
              in a mailbox:

              %?n?%n new messages.?

              You can also switch between two strings using the following construct:

              %?<sequence_char>?<if_string>&<else_string>?

              If the value of sequence_char is non-zero, if_string will  be  expanded,  otherwise
              else_string will be expanded.

              You  can  force  the  result  of  any  printf(3)-like  sequence  to be lowercase by
              prefixing the sequence character with an underscore (“_”) sign.   For  example,  if
              you want to display the local hostname in lowercase, you would use: “%_h”.

              If  you  prefix  the  sequence  character  with  a colon (“:”) character, mutt will
              replace any dots in the expansion by underscores. This might be helpful  with  IMAP
              folders that don't like dots in folder names.

       status_on_top
              Type: boolean
              Default: no

              Setting  this variable causes the “status bar” to be displayed on the first line of
              the screen rather than near the bottom. If $help is set, too it'll be placed at the
              bottom.

       strict_threads
              Type: boolean
              Default: no

              If  set, threading will only make use of the “In-Reply-To” and “References:” fields
              when you $sort by message threads.  By default, messages with the same subject  are
              grouped together in “pseudo threads.”. This may not always be desirable, such as in
              a personal mailbox where  you  might  have  several  unrelated  messages  with  the
              subjects  like  “hi”  which will get grouped together. See also $sort_re for a less
              drastic way of controlling this behavior.

       suspend
              Type: boolean
              Default: yes

              When unset, mutt won't stop when the user presses the terminal's susp key,  usually
              “^Z”. This is useful if you run mutt inside an xterm using a command like “xterm -e
              mutt”.

       text_flowed
              Type: boolean
              Default: no

              When set, mutt  will  generate  “format=flowed”  bodies  with  a  content  type  of
              “text/plain;  format=flowed”.   This  format  is  easier to handle for some mailing
              software, and generally just looks like ordinary text.  To  actually  make  use  of
              this format's features, you'll need support in your editor.

              Note that $indent_string is ignored when this option is set.

       thorough_search
              Type: boolean
              Default: yes

              Affects  the  ~b and ~h search operations described in section “patterns”.  If set,
              the headers and body/attachments of messages to  be  searched  are  decoded  before
              searching. If unset, messages are searched as they appear in the folder.

              Users  searching  attachments  or  for  non-ASCII  characters should set this value
              because decoding also includes MIME parsing/decoding  and  possible  character  set
              conversions.  Otherwise mutt will attempt to match against the raw message received
              (for example quoted-printable encoded or with encoded headers) which  may  lead  to
              incorrect search results.

       thread_received
              Type: boolean
              Default: no

              When  set, mutt uses the date received rather than the date sent to thread messages
              by subject.

       tilde
              Type: boolean
              Default: no

              When set, the internal-pager will pad blank lines to the bottom of the screen  with
              a tilde (“~”).

       time_inc
              Type: number
              Default: 0

              Along  with  $read_inc,  $write_inc,  and  $net_inc,  this  variable  controls  the
              frequency with which progress updates are displayed.  It  suppresses  updates  less
              than $time_inc milliseconds apart. This can improve throughput on systems with slow
              terminals, or when running mutt on a remote system.

              Also see the “tuning” section of the manual for performance considerations.

       timeout
              Type: number
              Default: 600

              When Mutt is waiting for user input either idling in menus  or  in  an  interactive
              prompt,  Mutt  would  block  until input is present. Depending on the context, this
              would prevent certain operations from  working,  like  checking  for  new  mail  or
              keeping an IMAP connection alive.

              This  variable  controls  how  many  seconds Mutt will at most wait until it aborts
              waiting for input, performs these operations and continues to wait for input.

              A value of zero or less will cause Mutt to never time out.

       tmpdir
              Type: path
              Default: “”

              This variable allows you to specify where  Mutt  will  place  its  temporary  files
              needed  for  displaying  and  composing messages.  If this variable is not set, the
              environment variable $TMPDIR is used.  If $TMPDIR is not set then “/tmp” is used.

       to_chars
              Type: string
              Default: “ +TCFL”

              Controls the character used to indicate mail addressed to you.  The first character
              is the one used when the mail is not addressed to your address.  The second is used
              when you are the only recipient of the message.  The third  is  when  your  address
              appears  in  the  “To:”  header  field,  but  you are not the only recipient of the
              message.  The fourth character is used when your address is specified in the  “Cc:”
              header  field,  but you are not the only recipient.  The fifth character is used to
              indicate mail that was sent by you.  The sixth character is used to indicate when a
              mail was sent to a mailing-list you subscribe to.

       trash
              Type: path
              Default: “”

              If set, this variable specifies the path of the trash folder where the mails marked
              for deletion will be moved, instead of being irremediably purged.

              NOTE: When you delete a message in the trash folder, it is really deleted, so  that
              you have a way to clean the trash.

       ts_icon_format
              Type: string
              Default: “M%?n?AIL&ail?”

              Controls  the  format  of  the  icon  title, as long as “$ts_enabled” is set.  This
              string is identical in formatting to the one used by “$status_format”.

       ts_enabled
              Type: boolean
              Default: no

              Controls whether mutt tries to set the terminal status line and  icon  name.   Most
              terminal emulators emulate the status line in the window title.

       ts_status_format
              Type: string
              Default: “Mutt with %?m?%m messages&no messages?%?n? [%n NEW]?”

              Controls  the  format  of the terminal status line (or window title), provided that
              “$ts_enabled” has been set. This string is identical in formatting to the one  used
              by “$status_format”.

       tunnel
              Type: string
              Default: “”

              Setting  this variable will cause mutt to open a pipe to a command instead of a raw
              socket. You may be able to use this to set up preauthenticated connections to  your
              IMAP/POP3/SMTP server. Example:

              set tunnel=”ssh -q mailhost.net /usr/local/libexec/imapd”

              Note:  For  this  example  to work you must be able to log in to the remote machine
              without having to enter a password.

              When set, Mutt uses the tunnel for all remote connections.   Please  see  “account-
              hook” in the manual for how to use different tunnel commands per connection.

       uncollapse_jump
              Type: boolean
              Default: no

              When  set,  Mutt  will  jump  to  the next unread message, if any, when the current
              thread is uncollapsed.

       uncollapse_new
              Type: boolean
              Default: yes

              When set, Mutt will automatically uncollapse any collapsed thread that  receives  a
              new  message.  When unset, collapsed threads will remain collapsed. the presence of
              the new message will still affect index sorting, though.

       use_8bitmime
              Type: boolean
              Default: no

              Warning: do not set this variable unless you are using a version of sendmail  which
              supports  the  -B8BITMIME  flag  (such as sendmail 8.8.x) or you may not be able to
              send mail.

              When set, Mutt will invoke $sendmail with the -B8BITMIME flag  when  sending  8-bit
              messages to enable ESMTP negotiation.

       use_domain
              Type: boolean
              Default: yes

              When  set, Mutt will qualify all local addresses (ones without the “@host” portion)
              with the value of $hostname.  If unset, no addresses will be qualified.

       use_envelope_from
              Type: boolean
              Default: no

              When  set,  mutt   will   set   the   envelope   sender   of   the   message.    If
              $envelope_from_address  is  set,  it  will be used as the sender address. If unset,
              mutt will attempt to derive the sender from the “From:” header.

              Note that this information is passed to sendmail command using the -f command  line
              switch.  Therefore  setting  this  option  is  not useful if the $sendmail variable
              already contains -f or if the executable pointed to by  $sendmail  doesn't  support
              the -f switch.

       use_from
              Type: boolean
              Default: yes

              When  set,  Mutt  will generate the “From:” header field when sending messages.  If
              unset, no “From:” header field will be generated unless the  user  explicitly  sets
              one using the “my_hdr” command.

       use_ipv6
              Type: boolean
              Default: yes

              When  set, Mutt will look for IPv6 addresses of hosts it tries to contact.  If this
              option is unset, Mutt will  restrict  itself  to  IPv4  addresses.   Normally,  the
              default should work.

       user_agent
              Type: boolean
              Default: yes

              When  set,  mutt  will  add a “User-Agent:” header to outgoing messages, indicating
              which version of mutt was used for composing them.

       visual
              Type: path
              Default: “”

              Specifies the visual editor to invoke  when  the  “~v”  command  is  given  in  the
              built-in editor.

       wait_key
              Type: boolean
              Default: yes

              Controls  whether  Mutt  will  ask you to press a key after an external command has
              been invoked by  these  functions:  <shell-escape>,  <pipe-message>,  <pipe-entry>,
              <print-message>, and <print-entry> commands.

              It  is  also  used  when  viewing  attachments  with “auto_view”, provided that the
              corresponding mailcap entry has a needsterminal flag, and the external  program  is
              interactive.

              When set, Mutt will always ask for a key. When unset, Mutt will wait for a key only
              if the external command returned a non-zero status.

       weed
              Type: boolean
              Default: yes

              When set, mutt will weed headers when displaying, forwarding, printing, or replying
              to messages.

       wrap
              Type: number
              Default: 0

              When set to a positive value, mutt will wrap text at $wrap characters.  When set to
              a negative value, mutt will wrap text so that there are $wrap characters  of  empty
              space  on the right side of the terminal. Setting it to zero makes mutt wrap at the
              terminal width.

              Also see $reflow_wrap.

       wrap_headers
              Type: number
              Default: 78

              This option specifies the number of characters to  use  for  wrapping  an  outgoing
              message's headers. Allowed values are between 78 and 998 inclusive.

              Note: This option usually shouldn't be changed. RFC5233 recommends a line length of
              78 (the default), so please only change this setting  when  you  know  what  you're
              doing.

       wrap_search
              Type: boolean
              Default: yes

              Controls whether searches wrap around the end.

              When  set,  searches  will  wrap  around  the  first  (or  last)  item. When unset,
              incremental searches will not wrap.

       wrapmargin
              Type: number
              Default: 0

              (DEPRECATED) Equivalent to setting $wrap with a negative value.

       write_bcc
              Type: boolean
              Default: yes

              Controls whether mutt writes out the “Bcc:” header when preparing  messages  to  be
              sent.   Exim  users  may wish to unset this. If mutt is set to deliver directly via
              SMTP (see $smtp_url), this option does nothing:  mutt  will  never  write  out  the
              “Bcc:” header in this case.

       write_inc
              Type: number
              Default: 10

              When  writing  a  mailbox,  a  message will be printed every $write_inc messages to
              indicate progress.  If set to 0, only a single message  will  be  displayed  before
              writing a mailbox.

              Also  see  the $read_inc, $net_inc and $time_inc variables and the “tuning” section
              of the manual for performance considerations.

SEE ALSO

       iconv(1),  iconv(3),  mailcap(5),  maildir(5),  mbox(5),  mutt(1),  printf(3),   regex(7),
       strftime(3)

       The Mutt Manual

       The Mutt home page: http://www.mutt.org/

AUTHOR

       Michael Elkins, and others.  Use <mutt-dev@mutt.org> to contact the developers.