Provided by: postfix_3.8.6-1build2_amd64 bug

NAME

       trivial-rewrite - Postfix address rewriting and resolving daemon

SYNOPSIS

       trivial-rewrite [generic Postfix daemon options]

DESCRIPTION

       The trivial-rewrite(8) daemon processes three types of client service requests:

       rewrite context address
              Rewrite an address to standard form, according to the address rewriting context:

              local  Append  the domain names specified with $myorigin or $mydomain to incomplete
                     addresses; do swap_bangpath and allow_percent_hack processing  as  described
                     below,  and  strip  source  routed  addresses  (@site,@site:user@domain)  to
                     user@domain form.

              remote Append the  domain  name  specified  with  $remote_header_rewrite_domain  to
                     incomplete addresses. Otherwise the result is identical to that of the local
                     address rewriting context. This prevents Postfix from  appending  the  local
                     domain to spam from poorly written remote clients.

       resolve sender address
              Resolve  the  address  to  a  (transport, nexthop, recipient, flags) quadruple. The
              meaning of the results is as follows:

              transport
                     The delivery agent to use. This is the  first  field  of  an  entry  in  the
                     master.cf file.

              nexthop
                     The host to send to and optional delivery method information.

              recipient
                     The envelope recipient address that is passed on to nexthop.

              flags  The  address  class,  whether  the  address  requires  relaying, whether the
                     address has problems, and whether the request failed.

       verify sender address
              Resolve the address for address verification purposes.

SERVER PROCESS MANAGEMENT

       The trivial-rewrite(8) servers run under control by the Postfix  master(8)  server.   Each
       server  can  handle  multiple simultaneous connections.  When all servers are busy while a
       client  connects,  the  master  creates  a  new  server   process,   provided   that   the
       trivial-rewrite  server  process  limit  is  not  exceeded.   Each  trivial-rewrite server
       terminates after serving at least $max_use clients of  after  $max_idle  seconds  of  idle
       time.

STANDARDS

       None. The command does not interact with the outside world.

SECURITY

       The trivial-rewrite(8) daemon is not security sensitive.  By default, this daemon does not
       talk to remote or local users.  It can  run  at  a  fixed  low  privilege  in  a  chrooted
       environment.

DIAGNOSTICS

       Problems and transactions are logged to syslogd(8) or postlogd(8).

CONFIGURATION PARAMETERS

       On   busy   mail  systems  a  long  time  may  pass  before  a  main.cf  change  affecting
       trivial-rewrite(8) is picked up. Use the command "postfix reload" to speed up a change.

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

COMPATIBILITY CONTROLS

       resolve_dequoted_address (yes)
              Resolve a recipient address safely instead of correctly, by looking inside quotes.

       Available with Postfix version 2.1 and later:

       resolve_null_domain (no)
              Resolve  an  address that ends in the "@" null domain as if the local hostname were
              specified, instead of rejecting the address as invalid.

       Available with Postfix version 2.3 and later:

       resolve_numeric_domain (no)
              Resolve "user@ipaddress" as "user@[ipaddress]", instead of rejecting the address as
              invalid.

       Available with Postfix version 2.5 and later:

       allow_min_user (no)
              Allow a sender or recipient address to have `-' as the first character.

ADDRESS REWRITING CONTROLS

       myorigin ($myhostname)
              The  domain  name  that  locally-posted mail appears to come from, and that locally
              posted mail is delivered to.

       allow_percent_hack (yes)
              Enable the rewriting of the form "user%domain" to "user@domain".

       append_at_myorigin (yes)
              With locally submitted mail, append  the  string  "@$myorigin"  to  mail  addresses
              without domain information.

       append_dot_mydomain (Postfix >= 3.0: no, Postfix < 3.0: yes)
              With  locally submitted mail, append the string ".$mydomain" to addresses that have
              no ".domain" information.

       recipient_delimiter (empty)
              The set of characters that can separate an email address localpart, user name, or a
              .forward file name from its extension.

       swap_bangpath (yes)
              Enable the rewriting of "site!user" into "user@site".

       Available in Postfix 2.2 and later:

       remote_header_rewrite_domain (empty)
              Don't  rewrite  message  headers  from remote clients at all when this parameter is
              empty; otherwise, rewrite message headers and append the specified domain  name  to
              incomplete addresses.

ROUTING CONTROLS

       The  following  is  applicable  to Postfix version 2.0 and later.  Earlier versions do not
       have   support    for:    virtual_transport,    relay_transport,    virtual_alias_domains,
       virtual_mailbox_domains or proxy_interfaces.

       local_transport (local:$myhostname)
              The  default mail delivery transport and next-hop destination for final delivery to
              domains listed with mydestination, and  for  [ipaddress]  destinations  that  match
              $inet_interfaces or $proxy_interfaces.

       virtual_transport (virtual)
              The  default mail delivery transport and next-hop destination for final delivery to
              domains listed with $virtual_mailbox_domains.

       relay_transport (relay)
              The default mail delivery transport and next-hop destination for remote delivery to
              domains listed with $relay_domains.

       default_transport (smtp)
              The  default mail delivery transport and next-hop destination for destinations that
              do    not    match     $mydestination,     $inet_interfaces,     $proxy_interfaces,
              $virtual_alias_domains, $virtual_mailbox_domains, or $relay_domains.

       parent_domain_matches_subdomains (see 'postconf -d' output)
              A  list of Postfix features where the pattern "example.com" also matches subdomains
              of example.com, instead of requiring an explicit ".example.com" pattern.

       relayhost (empty)
              The next-hop destination(s) for non-local  mail;  overrides  non-local  domains  in
              recipient addresses.

       transport_maps (empty)
              Optional  lookup  tables  with mappings from recipient address to (message delivery
              transport, next-hop destination).

       Available in Postfix version 2.3 and later:

       sender_dependent_relayhost_maps (empty)
              A sender-dependent override for the global relayhost parameter setting.

       Available in Postfix version 2.5 and later:

       empty_address_relayhost_maps_lookup_key (<>)
              The sender_dependent_relayhost_maps search string that will be used instead of  the
              null sender address.

       Available in Postfix version 2.7 and later:

       empty_address_default_transport_maps_lookup_key (<>)
              The sender_dependent_default_transport_maps search string that will be used instead
              of the null sender address.

       sender_dependent_default_transport_maps (empty)
              A sender-dependent override for the global default_transport parameter setting.

ADDRESS VERIFICATION CONTROLS

       Postfix version 2.1 introduces sender and recipient address verification.  This feature is
       implemented  by sending probe email messages that are not actually delivered.  By default,
       address verification probes use the same route  as  regular  mail.  To  override  specific
       aspects  of  message  routing  for address verification probes, specify one or more of the
       following:

       address_verify_local_transport ($local_transport)
              Overrides the local_transport parameter setting for address verification probes.

       address_verify_virtual_transport ($virtual_transport)
              Overrides the virtual_transport parameter setting for address verification probes.

       address_verify_relay_transport ($relay_transport)
              Overrides the relay_transport parameter setting for address verification probes.

       address_verify_default_transport ($default_transport)
              Overrides the default_transport parameter setting for address verification probes.

       address_verify_relayhost ($relayhost)
              Overrides the relayhost parameter setting for address verification probes.

       address_verify_transport_maps ($transport_maps)
              Overrides the transport_maps parameter setting for address verification probes.

       Available in Postfix version 2.3 and later:

       address_verify_sender_dependent_relayhost_maps ($sender_dependent_relayhost_maps)
              Overrides  the  sender_dependent_relayhost_maps  parameter  setting   for   address
              verification probes.

       Available in Postfix version 2.7 and later:

       address_verify_sender_dependent_default_transport_maps
       ($sender_dependent_default_transport_maps)
              Overrides the sender_dependent_default_transport_maps parameter setting for address
              verification probes.

MISCELLANEOUS CONTROLS

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

       daemon_timeout (18000s)
              How  much  time  a Postfix daemon process may take to handle a request before it is
              terminated by a built-in watchdog timer.

       empty_address_recipient (MAILER-DAEMON)
              The recipient of mail addressed to the null address.

       ipc_timeout (3600s)
              The time limit for sending or receiving information over an internal  communication
              channel.

       max_idle (100s)
              The  maximum  amount  of  time  that  an  idle  Postfix daemon process waits for an
              incoming connection before terminating voluntarily.

       max_use (100)
              The maximal number of incoming connections  that  a  Postfix  daemon  process  will
              service before terminating voluntarily.

       relocated_maps (empty)
              Optional  lookup  tables  with new contact information for users or domains that no
              longer exist.

       process_id (read-only)
              The process ID of a Postfix command or daemon process.

       process_name (read-only)
              The process name of a Postfix command or daemon process.

       queue_directory (see 'postconf -d' output)
              The location of the Postfix top-level queue directory.

       show_user_unknown_table_name (yes)
              Display the name of the recipient table in the "User unknown" responses.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (see 'postconf -d' output)
              A prefix that is prepended to the process name in  syslog  records,  so  that,  for
              example, "smtpd" becomes "prefix/smtpd".

       Available in Postfix version 2.0 and later:

       helpful_warnings (yes)
              Log   warnings  about  problematic  configuration  settings,  and  provide  helpful
              suggestions.

       Available in Postfix 3.3 and later:

       service_name (read-only)
              The master.cf service name of a Postfix daemon process.

SEE ALSO

       postconf(5), configuration parameters
       transport(5), transport table format
       relocated(5), format of the "user has moved" table
       master(8), process manager
       postlogd(8), Postfix logging
       syslogd(8), system logging

README FILES

       Use "postconf readme_directory" or "postconf html_directory" to locate this information.
       ADDRESS_CLASS_README, Postfix address classes howto
       ADDRESS_VERIFICATION_README, Postfix address verification

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

                                                                        TRIVIAL-REWRITE(8postfix)