trivial-rewrite.8.html [plain text]
<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html> <head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<title> Postfix manual - trivial-rewrite(8) </title>
</head> <body> <pre>
TRIVIAL-REWRITE(8) TRIVIAL-REWRITE(8)
<b>NAME</b>
trivial-rewrite - Postfix address rewriting and resolving
daemon
<b>SYNOPSIS</b>
<b>trivial-rewrite</b> [generic Postfix daemon options]
<b>DESCRIPTION</b>
The <b>trivial-rewrite</b> daemon processes three types of client
service requests:
<b>rewrite</b>
Rewrite an address to standard form. The <b>trivial-</b>
<b>rewrite</b> daemon by default appends local domain
information to unqualified addresses, swaps bang
paths to domain form, and strips source routing
information. This process is under control of sev-
eral configuration parameters (see below).
<b>resolve</b>
Resolve an address to a (<i>transport</i>, <i>nexthop</i>, <i>recip-</i>
<i>ient</i>) triple. The meaning of the results is as fol-
lows:
<i>transport</i>
The delivery agent to use. This is the first
field of an entry in the <b>master.cf</b> file.
<i>nexthop</i>
The host to send to and optional delivery
method information.
<i>recipient</i>
The envelope recipient address that is
passed on to <i>nexthop</i>.
<b>verify</b> Resolve an address for address verification pur-
poses.
<b>SERVER PROCESS MANAGEMENT</b>
The trivial-rewrite servers run under control by the Post-
fix master server. Each server can handle multiple simul-
taneous 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 <b>$<a href="postconf.5.html#max_use">max_use</a></b> clients of after <b>$<a href="postconf.5.html#max_idle">max_idle</a></b>
seconds of idle time.
<b>STANDARDS</b>
None. The command does not interact with the outside
world.
<b>SECURITY</b>
The <b>trivial-rewrite</b> 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.
<b>DIAGNOSTICS</b>
Problems and transactions are logged to <b>syslogd</b>(8).
<b>CONFIGURATION PARAMETERS</b>
On busy mail systems a long time may pass before a <b>main.cf</b>
change affecting trivial_rewrite(8) is picked up. Use the
command "<b>postfix reload</b>" to speed up a change.
The text below provides only a parameter summary. See
<a href="postconf.5.html">postconf(5)</a> for more details including examples.
<b>COMPATIBILITY CONTROLS</b>
<b><a href="postconf.5.html#resolve_dequoted_address">resolve_dequoted_address</a> (yes)</b>
Resolve a recipient address safely instead of cor-
rectly, by looking inside quotes.
<b><a href="postconf.5.html#resolve_null_domain">resolve_null_domain</a> (no)</b>
Resolve an address that ends in the "@" null domain
as if the local hostname were specified, instead of
rejecting the address as invalid.
<b>ADDRESS REWRITING CONTROLS</b>
<b><a href="postconf.5.html#myorigin">myorigin</a> ($<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The default domain name that locally-posted mail
appears to come from, and that locally posted mail
is delivered to.
<b><a href="postconf.5.html#allow_percent_hack">allow_percent_hack</a> (yes)</b>
Enable the rewriting of the form "user%domain" to
"user@domain".
<b><a href="postconf.5.html#append_at_myorigin">append_at_myorigin</a> (yes)</b>
Append the string "@$<a href="postconf.5.html#myorigin">myorigin</a>" to mail addresses
without domain information.
<b><a href="postconf.5.html#append_dot_mydomain">append_dot_mydomain</a> (yes)</b>
Append the string ".$<a href="postconf.5.html#mydomain">mydomain</a>" to addresses that
have no ".domain" information.
<b><a href="postconf.5.html#recipient_delimiter">recipient_delimiter</a> (empty)</b>
The separator between user names and address exten-
sions (user+foo).
<b><a href="postconf.5.html#swap_bangpath">swap_bangpath</a> (yes)</b>
Enable the rewriting of "site!user" into
"user@site".
<b>ROUTING CONTROLS</b>
The following is applicable to Postfix version 2.0 and
later. Earlier versions do not have support for: <a href="postconf.5.html#virtual_transport">vir</a>-
<a href="postconf.5.html#virtual_transport">tual_transport</a>, <a href="postconf.5.html#relay_transport">relay_transport</a>, <a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>,
<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> or <a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>.
<b><a href="postconf.5.html#local_transport">local_transport</a> (local:$<a href="postconf.5.html#myhostname">myhostname</a>)</b>
The default mail delivery transport for domains
that match $<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a> or
$<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>.
<b><a href="postconf.5.html#virtual_transport">virtual_transport</a> (virtual)</b>
The default mail delivery transport for domains
that match the $<a href="postconf.5.html#virtual_mailbox_domains">virtual_mailbox_domains</a> parameter
value.
<b><a href="postconf.5.html#relay_transport">relay_transport</a> (relay)</b>
The default mail delivery transport and next-hop
information for domains that match the
$<a href="postconf.5.html#relay_domains">relay_domains</a> parameter value.
<b><a href="postconf.5.html#default_transport">default_transport</a> (smtp)</b>
The default mail delivery transport for domains
that do not match $<a href="postconf.5.html#mydestination">mydestination</a>, $<a href="postconf.5.html#inet_interfaces">inet_interfaces</a>,
$<a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a>, $<a href="postconf.5.html#virtual_alias_domains">virtual_alias_domains</a>, $<a href="postconf.5.html#virtual_mailbox_domains">vir</a>-
<a href="postconf.5.html#virtual_mailbox_domains">tual_mailbox_domains</a>, or $<a href="postconf.5.html#relay_domains">relay_domains</a>.
<b><a href="postconf.5.html#parent_domain_matches_subdomains">parent_domain_matches_subdomains</a> (see 'postconf -d' out-</b>
<b>put)</b>
What Postfix features match subdomains of
"domain.tld" automatically, instead of requiring an
explicit ".domain.tld" pattern.
<b><a href="postconf.5.html#relayhost">relayhost</a> (empty)</b>
The default host to send non-local mail to when no
entry is matched in the optional <a href="transport.5.html">transport(5)</a>
table.
<b><a href="postconf.5.html#transport_maps">transport_maps</a> (empty)</b>
Optional lookup tables with mappings from recipient
address to (message delivery transport, next-hop
destination).
<b>ADDRESS VERIFICATION CONTROLS</b>
Postfix version 2.1 introduces sender and recipient
address verification. This feature is implemented by
sending probe email messages that are not actually deliv-
ered. By default, address verification probes use the
same route as regular mail. To override specific aspects
of message routing for address verification probes, spec-
ify one or more of the following:
<b><a href="postconf.5.html#address_verify_local_transport">address_verify_local_transport</a> ($<a href="postconf.5.html#local_transport">local_transport</a>)</b>
Overrides the <a href="postconf.5.html#local_transport">local_transport</a> parameter setting for
address verification probes.
<b><a href="postconf.5.html#address_verify_virtual_transport">address_verify_virtual_transport</a> ($<a href="postconf.5.html#virtual_transport">virtual_transport</a>)</b>
Overrides the <a href="postconf.5.html#virtual_transport">virtual_transport</a> parameter setting
for address verification probes.
<b><a href="postconf.5.html#address_verify_relay_transport">address_verify_relay_transport</a> ($<a href="postconf.5.html#relay_transport">relay_transport</a>)</b>
Overrides the <a href="postconf.5.html#relay_transport">relay_transport</a> parameter setting for
address verification probes.
<b><a href="postconf.5.html#address_verify_default_transport">address_verify_default_transport</a> ($<a href="postconf.5.html#default_transport">default_transport</a>)</b>
Overrides the <a href="postconf.5.html#default_transport">default_transport</a> parameter setting
for address verification probes.
<b><a href="postconf.5.html#address_verify_relayhost">address_verify_relayhost</a> ($<a href="postconf.5.html#relayhost">relayhost</a>)</b>
Overrides the <a href="postconf.5.html#relayhost">relayhost</a> parameter setting for
address verification probes.
<b><a href="postconf.5.html#address_verify_transport_maps">address_verify_transport_maps</a> ($<a href="postconf.5.html#transport_maps">transport_maps</a>)</b>
Overrides the <a href="postconf.5.html#transport_maps">transport_maps</a> parameter setting for
address verification probes.
<b>MISCELLANEOUS CONTROLS</b>
<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
The default location of the Postfix main.cf and
master.cf configuration files.
<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
How much time a Postfix daemon process may take to
handle a request before it is terminated by a
built-in watchdog timer.
<b><a href="postconf.5.html#empty_address_recipient">empty_address_recipient</a> (MAILER-DAEMON)</b>
The recipient of mail addressed to the null
address.
<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
The time limit for sending or receiving information
over an internal communication channel.
<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
The maximum amount of time that an idle Postfix
daemon process waits for the next service request
before exiting.
<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
The maximal number of connection requests before a
Postfix daemon process terminates.
<b><a href="postconf.5.html#relocated_maps">relocated_maps</a> (empty)</b>
Optional lookup tables with new contact information
for users or domains that no longer exist.
<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
The process ID of a Postfix command or daemon pro-
cess.
<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
The process name of a Postfix command or daemon
process.
<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
The location of the Postfix top-level queue direc-
tory.
<b><a href="postconf.5.html#show_user_unknown_table_name">show_user_unknown_table_name</a> (yes)</b>
Display the name of the recipient table in the
"User unknown" responses.
<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
The syslog facility of Postfix logging.
<b><a href="postconf.5.html#syslog_name">syslog_name</a> (postfix)</b>
The mail system name that is prepended to the pro-
cess name in syslog records, so that "smtpd"
becomes, for example, "postfix/smtpd".
Available in Postfix version 2.0 and later:
<b><a href="postconf.5.html#helpful_warnings">helpful_warnings</a> (yes)</b>
Log warnings about problematic configuration set-
tings, and provide helpful suggestions.
<b>SEE ALSO</b>
<a href="postconf.5.html">postconf(5)</a>, configuration parameters
<a href="transport.5.html">transport(5)</a>, transport table format
<a href="relocated.5.html">relocated(5)</a>, format of the "user has moved" table
<a href="master.8.html">master(8)</a>, process manager
syslogd(8), system logging
<b>README FILES</b>
<a href="ADDRESS_CLASS_README.html">ADDRESS_CLASS_README</a>, Postfix address classes howto
<a href="ADDRESS_VERIFICATION_README.html">ADDRESS_VERIFICATION_README</a>, Postfix address verification
<b>LICENSE</b>
The Secure Mailer license must be distributed with this
software.
<b>AUTHOR(S)</b>
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
TRIVIAL-REWRITE(8)
</pre> </body> </html>