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TRIVIAL-REWRITE(8)							       TRIVIAL-REWRITE(8)

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  mas-
		     ter.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  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-re-
       write  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 environ-
       ment.

DIAGNOSTICS
       Problems and transactions are logged to syslogd(8).

CONFIGURATION PARAMETERS
       On busy mail systems a long time may pass before a main.cf  change  affecting  trivial-re-
       write(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 includ-
       ing examples.

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

       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.

       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 with-
	      out domain information.

       append_dot_mydomain (yes)
	      With locally submitted mail, append the string ".$mydomain" to addresses that  have
	      no ".domain" information.

       recipient_delimiter (empty)
	      The separator between user names and address extensions (user+foo).

       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_mail-
       box_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,   $vir-
	      tual_alias_domains, $virtual_mailbox_domains, or $relay_domains.

       parent_domain_matches_subdomains (see 'postconf -d' output)
	      What  Postfix  features  match subdomains of "domain.tld" automatically, instead of
	      requiring an explicit ".domain.tld" pattern.

       relayhost (empty)
	      The next-hop destination of non-local mail; overrides non-local domains in  recipi-
	      ent 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 verifi-
	      cation probes.

       Available in Postfix version 2.7 and later:

       address_verify_sender_dependent_default_transport_maps	($sender_dependent_default_trans-
       port_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 incom-
	      ing connection before terminating voluntarily.

       max_use (100)
	      The maximal number of incoming connections that a Postfix daemon process will  ser-
	      vice 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)
	      The mail system name that is prepended to the process name in  syslog  records,  so
	      that "smtpd" becomes, for example, "postfix/smtpd".

       Available in Postfix version 2.0 and later:

       helpful_warnings (yes)
	      Log  warnings about problematic configuration settings, and provide helpful sugges-
	      tions.

SEE ALSO
       postconf(5), configuration parameters
       transport(5), transport table format
       relocated(5), format of the "user has moved" table
       master(8), process manager
       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

									       TRIVIAL-REWRITE(8)
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