Provided by: postfix_3.1.0-3_amd64 bug

NAME

       postconf - Postfix configuration utility

SYNOPSIS

   Managing main.cf:

       postconf [-dfhHnopvx] [-c config_dir] [-C class,...] [parameter ...]

       postconf [-epv] [-c config_dir] parameter=value ...

       postconf -# [-pv] [-c config_dir] parameter ...

       postconf -X [-pv] [-c config_dir] parameter ...

   Managing master.cf service entries:

       postconf -M [-fovx] [-c config_dir] [service[/type] ...]

       postconf -M [-ev] [-c config_dir] service/type=value ...

       postconf -M# [-v] [-c config_dir] service/type ...

       postconf -MX [-v] [-c config_dir] service/type ...

   Managing master.cf service fields:

       postconf -F [-fhHovx] [-c config_dir] [service[/type[/field]] ...]

       postconf -F [-ev] [-c config_dir] service/type/field=value ...

   Managing master.cf service parameters:

       postconf -P [-fhHovx] [-c config_dir] [service[/type[/parameter]] ...]

       postconf -P [-ev] [-c config_dir] service/type/parameter=value ...

       postconf -PX [-v] [-c config_dir] service/type/parameter ...

   Managing bounce message templates:

       postconf -b [-v] [-c config_dir] [template_file]

       postconf -t [-v] [-c config_dir] [template_file]

   Managing TLS features:

       postconf -T mode [-v] [-c config_dir]

   Managing other configuration:

       postconf -a|-A|-l|-m [-v] [-c config_dir]

DESCRIPTION

       By  default,  the  postconf(1)  command  displays  the  values  of  main.cf  configuration
       parameters, and warns about possible mis-typed parameter names (Postfix  2.9  and  later).
       It  can also change main.cf configuration parameter values, or display other configuration
       information about the Postfix mail system.

       Options:

       -a     List the available SASL server plug-in types.  The SASL plug-in  type  is  selected
              with  the  smtpd_sasl_type  configuration  parameter by specifying one of the names
              listed below.

              cyrus  This server plug-in is available when  Postfix  is  built  with  Cyrus  SASL
                     support.

              dovecot
                     This server plug-in uses the Dovecot authentication server, and is available
                     when Postfix is built with any form of SASL support.

              This feature is available with Postfix 2.3 and later.

       -A     List the available SASL client plug-in types.  The SASL plug-in  type  is  selected
              with  the  smtp_sasl_type  or lmtp_sasl_type configuration parameters by specifying
              one of the names listed below.

              cyrus  This client plug-in is available when  Postfix  is  built  with  Cyrus  SASL
                     support.

              This feature is available with Postfix 2.3 and later.

       -b [template_file]
              Display  the  message  text  that  appears  at  the  beginning  of  delivery status
              notification (DSN) messages, replacing $name  expressions  with  actual  values  as
              described in bounce(5).

              To  override the built-in templates, specify a template file name at the end of the
              postconf(1)  command  line,  or  specify  a  file  name   in   main.cf   with   the
              bounce_template_file parameter.

              To  force  selection of the built-in templates, specify an empty template file name
              on the postconf(1) command line (in shell language: "").

              This feature is available with Postfix 2.3 and later.

       -c config_dir
              The main.cf configuration file is in the named directory  instead  of  the  default
              configuration directory.

       -C class,...
              When  displaying  main.cf  parameters,  select  only  parameters from the specified
              class(es):

              builtin
                     Parameters with built-in names.

              service
                     Parameters with service-defined names (the first field of a master.cf  entry
                     plus a Postfix-defined suffix).

              user   Parameters with user-defined names.

              all    All the above classes.

              The default is as if "-C all" is specified.

              This feature is available with Postfix 2.9 and later.

       -d     Print  main.cf  default parameter settings instead of actual settings.  Specify -df
              to fold long lines for human readability (Postfix 2.9 and later).

       -e     Edit the main.cf  configuration  file,  and  update  parameter  settings  with  the
              "name=value" pairs on the postconf(1) command line.

              With  -M,  edit  the  master.cf configuration file, and replace one or more service
              entries with new values as specified with "service/type=value" on  the  postconf(1)
              command line.

              With  -F,  edit  the  master.cf configuration file, and replace one or more service
              fields  with  new  values  as  specied  with  "service/type/field=value"   on   the
              postconf(1)  command line. Currently, the "command" field contains the command name
              and command arguments.  this may change in the near future, so that  the  "command"
              field  contains  only  the command name, and a new "arguments" pseudofield contains
              the command arguments.

              With -P, edit the master.cf configuration file, and  add  or  update  one  or  more
              service parameter settings (-o parameter=value settings) with new values as specied
              with "service/type/parameter=value" on the postconf(1) command line.

              In all cases the file is copied to  a  temporary  file  then  renamed  into  place.
              Specify  quotes  to  protect  special  characters and whitespace on the postconf(1)
              command line.

              The -e option is no longer needed with Postfix version 2.8 and later.

       -f     Fold long lines when printing main.cf or master.cf configuration file entries,  for
              human readability.

              This feature is available with Postfix 2.9 and later.

       -F     Show  master.cf  per-entry field settings (by default all services and all fields),
              formatted as "service/type/field=value", one per line. Specify  -Ff  to  fold  long
              lines.

              Specify  one or more "service/type/field" instances on the postconf(1) command line
              to limit the output to fields of interest.  Trailing parameter name or service type
              fields that are omitted will be handled as "*" wildcard fields.

              This feature is available with Postfix 2.11 and later.

       -h     Show  parameter  or  attribute  values  without  the  "name = " label that normally
              precedes the value.

       -H     Show parameter or attribute names without the " = value" that normally follows  the
              name.

              This feature is available with Postfix 3.1 and later.

       -l     List  the  names  of  all  supported mailbox locking methods.  Postfix supports the
              following methods:

              flock  A kernel-based advisory locking method for local files only.   This  locking
                     method is available on systems with a BSD compatible library.

              fcntl  A kernel-based advisory locking method for local and remote files.

              dotlock
                     An  application-level  locking  method.  An  application  locks a file named
                     filename by  creating  a  file  named  filename.lock.   The  application  is
                     expected  to remove its own lock file, as well as stale lock files that were
                     left behind after abnormal program termination.

       -m     List the names of all supported lookup table types. In Postfix configuration files,
              lookup  tables  are  specified  as type:name, where type is one of the types listed
              below. The table name syntax depends on the lookup table type as described  in  the
              DATABASE_README document.

              btree  A  sorted,  balanced  tree structure.  Available on systems with support for
                     Berkeley DB databases.

              cdb    A  read-optimized  structure  with  no  support  for  incremental   updates.
                     Available on systems with support for CDB databases.

              cidr   A  table  that  associates values with Classless Inter-Domain Routing (CIDR)
                     patterns. This is described in cidr_table(5).

              dbm    An indexed file type based on hashing.  Available on  systems  with  support
                     for DBM databases.

              environ
                     The  UNIX  process  environment  array. The lookup key is the variable name.
                     Originally implemented for testing, someone may find this useful someday.

              fail   A table that reliably fails all requests. The lookup table name is used  for
                     logging. This table exists to simplify Postfix error tests.

              hash   An  indexed  file  type based on hashing.  Available on systems with support
                     for Berkeley DB databases.

              inline (read-only)
                     A non-shared, in-memory lookup table. Example: "inline:{ key=value, { key  =
                     text  with  whitespace  or  comma  }}".  Key-value  pairs  are  separated by
                     whitespace or comma; whitespace after "{" and before "}" is ignored.  Inline
                     tables  eliminate  the  need  to create a database file for just a few fixed
                     elements.  See also the static: map type.

              internal
                     A non-shared, in-memory hash table. Its content  are  lost  when  a  process
                     terminates.

              lmdb   OpenLDAP  LMDB  database  (a  memory-mapped, persistent file).  Available on
                     systems  with  support  for  LMDB   databases.    This   is   described   in
                     lmdb_table(5).

              ldap (read-only)
                     LDAP database client. This is described in ldap_table(5).

              memcache
                     Memcache database client. This is described in memcache_table(5).

              mysql (read-only)
                     MySQL  database  client.   Available  on  systems  with  support  for  MySQL
                     databases.  This is described in mysql_table(5).

              pcre (read-only)
                     A lookup table based on  Perl  Compatible  Regular  Expressions.   The  file
                     format is described in pcre_table(5).

              pgsql (read-only)
                     PostgreSQL database client. This is described in pgsql_table(5).

              pipemap (read-only)
                     A   lookup   table   that   constructs   a  pipeline  of  tables.   Example:
                     "pipemap:{type_1:name_1,  ..., type_n:name_n}".  Each  "pipemap:"  query  is
                     given to the first table.  Each lookup result becomes the query for the next
                     table in the pipeline, and the last table produces the final  result.   When
                     any  table  lookup  produces no result, the pipeline produces no result. The
                     first and last characters of the "pipemap:" table name must be "{" and  "}".
                     Within these, individual maps are separated with comma or whitespace.

              proxy  Postfix proxymap(8) client for shared access to Postfix databases. The table
                     name syntax is type:name.

              randmap (read-only)
                     An   in-memory   table   that   performs    random    selection.    Example:
                     "randmap:{result_1,  ...,  result_n}".  Each  table  query  returns a random
                     choice from the specified results. The first  and  last  characters  of  the
                     "randmap:" table name must be "{" and "}".  Within these, individual results
                     are separated with comma or whitespace.  To  give  a  specific  result  more
                     weight, specify it multiple times.

              regexp (read-only)
                     A lookup table based on regular expressions. The file format is described in
                     regexp_table(5).

              sdbm   An indexed file type based on hashing.  Available on  systems  with  support
                     for SDBM databases.

              socketmap (read-only)
                     Sendmail-style socketmap client. The table name is inet:host:port:name for a
                     TCP/IP server, or unix:pathname:name  for  a  UNIX-domain  server.  This  is
                     described in socketmap_table(5).

              sqlite (read-only)
                     SQLite database. This is described in sqlite_table(5).

              static (read-only)
                     A  table  that  always  returns  its  name  as  lookup  result. For example,
                     static:foobar always returns the string foobar  as  lookup  result.  Specify
                     "static:{  text with whitespace }" when the result contains whitespace; this
                     form ignores whitespace after "{" and before "}". See also the inline: map.

              tcp (read-only)
                     TCP/IP client. The protocol is described in tcp_table(5).

              texthash (read-only)
                     Produces similar results as hash: files, except that you don't need  to  run
                     the  postmap(1)  command  before  you can use the file, and that it does not
                     detect changes after the file is read.

              unionmap (read-only)
                     A  table  that  sends  each  query  to  multiple  lookup  tables  and   that
                     concatenates  all  found results, separated by comma.  The table name syntax
                     is the same as for pipemap.

              unix (read-only)
                     A limited view of the UNIX authentication database. The following tables are
                     implemented:

                     unix:passwd.byname
                            The  table  is  the  UNIX password database. The key is a login name.
                            The result is a password file entry in passwd(5) format.

                     unix:group.byname
                            The table is the UNIX group database. The key is a group  name.   The
                            result is a group file entry in group(5) format.

              Other table types may exist depending on how Postfix was built.

       -M     Show master.cf file contents instead of main.cf file contents.  Specify -Mf to fold
              long lines for human readability.

              Specify   zero   or   more    arguments,    each    with    a    service-name    or
              service-name/service-type  pair,  where  service-name  is  the  first  field  of  a
              master.cf entry and service-type is one of (inet, unix, fifo, or pass).

              If service-name  or  service-name/service-type  is  specified,  only  the  matching
              master.cf  entries will be output. For example, "postconf -Mf smtp" will output all
              services named "smtp", and "postconf -Mf  smtp/inet"  will  output  only  the  smtp
              service that listens on the network.  Trailing service type fields that are omitted
              will be handled as "*" wildcard fields.

              This feature is available with Postfix 2.9 and later. The syntax was  changed  from
              "name.type" to "name/type", and "*" wildcard support was added with Postfix 2.11.

       -n     Show  only  configuration  parameters  that  have  explicit  name=value settings in
              main.cf.  Specify -nf to fold long lines for human  readability  (Postfix  2.9  and
              later).

       -o name=value
              Override main.cf parameter settings.

              This feature is available with Postfix 2.10 and later.

       -p     Show main.cf parameter settings. This is the default.

              This feature is available with Postfix 2.11 and later.

       -P     Show  master.cf  service  parameter  settings  (by  default  all  services  and all
              parameters), formatted as "service/type/parameter=value", one  per  line.   Specify
              -Pf to fold long lines.

              Specify  one  or more "service/type/parameter" instances on the postconf(1) command
              line to limit the output to parameters of interest.   Trailing  parameter  name  or
              service type fields that are omitted will be handled as "*" wildcard fields.

              This feature is available with Postfix 2.11 and later.

       -t [template_file]
              Display  the  templates  for  text that appears at the beginning of delivery status
              notification (DSN) messages, without expanding $name expressions.

              To override the built-in templates, specify a template file name at the end of  the
              postconf(1)   command   line,   or   specify  a  file  name  in  main.cf  with  the
              bounce_template_file parameter.

              To force selection of the built-in templates, specify an empty template  file  name
              on the postconf(1) command line (in shell language: "").

              This feature is available with Postfix 2.3 and later.

       -T mode
              If  Postfix  is  compiled  without  TLS  support, the -T option produces no output.
              Otherwise, if an invalid mode is specified, the -T  option  reports  an  error  and
              exits with a non-zero status code. The valid modes are:

              compile-version
                     Output  the OpenSSL version that Postfix was compiled with (i.e. the OpenSSL
                     version in a header file). The output format is the same as with the command
                     "openssl version".

              run-version
                     Output  the OpenSSL version that Postfix is linked with at runtime (i.e. the
                     OpenSSL version in a shared library).

              public-key-algorithms
                     Output the lower-case names of  the  supported  public-key  algorithms,  one
                     per-line.

              This feature is available with Postfix 3.1 and later.

       -v     Enable  verbose  logging  for  debugging  purposes.  Multiple  -v  options make the
              software increasingly verbose.

       -x     Expand $name in main.cf or master.cf parameter values. The expansion is recursive.

              This feature is available with Postfix 2.10 and later.

       -X     Edit the main.cf configuration  file,  and  remove  the  parameters  named  on  the
              postconf(1)  command  line.   Specify  a  list of parameter names, not "name=value"
              pairs.

              With -M, edit the master.cf configuration file, and  remove  one  or  more  service
              entries as specified with "service/type" on the postconf(1) command line.

              With  -P,  edit  the  master.cf  configuration file, and remove one or more service
              parameter   settings   (-o    parameter=value    settings)    as    specied    with
              "service/type/parameter" on the postconf(1) command line.

              In  all  cases  the  file  is  copied  to a temporary file then renamed into place.
              Specify quotes to protect special characters on the postconf(1) command line.

              There is no postconf(1) command to perform the reverse operation.

              This feature is available with Postfix 2.10 and later.  Support for -M and  -P  was
              added with Postfix 2.11.

       -#     Edit  the  main.cf  configuration file, and comment out the parameters named on the
              postconf(1) command line, so that those parameters revert to their default  values.
              Specify a list of parameter names, not "name=value" pairs.

              With -M, edit the master.cf configuration file, and comment out one or more service
              entries as specified with "service/type" on the postconf(1) command line.

              In all cases the file is copied to  a  temporary  file  then  renamed  into  place.
              Specify quotes to protect special characters on the postconf(1) command line.

              There is no postconf(1) command to perform the reverse operation.

              This feature is available with Postfix 2.6 and later. Support for -M was added with
              Postfix 2.11.

DIAGNOSTICS

       Problems are reported to the standard error stream.

ENVIRONMENT

       MAIL_CONFIG
              Directory with Postfix configuration files.

CONFIGURATION PARAMETERS

       The following main.cf parameters are especially relevant to this program.

       The text below provides only  a  parameter  summary.  See  postconf(5)  for  more  details
       including examples.

       config_directory (see 'postconf -d' output)
              The default location of the Postfix main.cf and master.cf configuration files.

       bounce_template_file (empty)
              Pathname of a configuration file with bounce message templates.

FILES

       /etc/postfix/main.cf, Postfix configuration parameters
       /etc/postfix/master.cf, Postfix master daemon configuration

SEE ALSO

       bounce(5), bounce template file format master(5), master.cf
       configuration file syntax postconf(5), main.cf configuration
       file syntax

README FILES

       Use "postconf readme_directory" or "postconf html_directory" to locate this information.
       DATABASE_README, Postfix lookup table overview

LICENSE

       The Secure Mailer license must be distributed with this software.

AUTHOR(S)

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA

                                                                                      POSTCONF(1)