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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link rel='stylesheet' type='text/css' href='postfix-doc.css'>
<title> Postfix manual - discard(8) </title>
</head> <body> <pre>
DISCARD(8)                                                          DISCARD(8)

<b>NAME</b>
       discard - Postfix discard mail delivery agent

<b>SYNOPSIS</b>
       <b>discard</b> [generic Postfix daemon options]

<b>DESCRIPTION</b>
       The  Postfix <a href="discard.8.html"><b>discard</b>(8)</a> delivery agent processes delivery requests from
       the queue manager. Each  request  specifies  a  queue  file,  a  sender
       address,  a next-hop destination that is treated as the reason for dis-
       carding the mail, and recipient information.  The reason  may  be  pre-
       fixed with an <a href="https://tools.ietf.org/html/rfc3463">RFC 3463</a>-compatible detail code.  This program expects to
       be run from the <a href="master.8.html"><b>master</b>(8)</a> process manager.

       The <a href="discard.8.html"><b>discard</b>(8)</a> delivery agent pretends to deliver all recipients in the
       delivery  request,  logs  the  "next-hop" destination as the reason for
       discarding the mail, updates the queue file, and either  marks  recipi-
       ents  as  finished or informs the queue manager that delivery should be
       tried again at a later time.

       Delivery status reports are sent to the <a href="trace.8.html"><b>trace</b>(8)</a> daemon as appropriate.

<b>SECURITY</b>
       The  <a href="discard.8.html"><b>discard</b>(8)</a>  mailer  is not security-sensitive. It does not talk to
       the network, and can be run chrooted at fixed low privilege.

<b>STANDARDS</b>
       <a href="https://tools.ietf.org/html/rfc3463">RFC 3463</a> (Enhanced Status Codes)

<b>DIAGNOSTICS</b>
       Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>.

       Depending on the setting of the <b><a href="postconf.5.html#notify_classes">notify_classes</a></b> parameter, the  postmas-
       ter is notified of bounces and of other trouble.

<b>CONFIGURATION PARAMETERS</b>
       Changes  to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically as <a href="discard.8.html"><b>discard</b>(8)</a> processes
       run for only a limited amount of time. 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"><b>postconf</b>(5)</a> for
       more details including examples.

       <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
              The default location of the Postfix <a href="postconf.5.html">main.cf</a> and  <a href="master.5.html">master.cf</a>  con-
              figuration 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#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
              The maximal number of digits after the decimal point  when  log-
              ging sub-second delay values.

       <b><a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a> (double-bounce)</b>
              The  sender  address of postmaster notifications that are gener-
              ated by the mail system.

       <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 an incoming connection before terminating voluntarily.

       <b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
              The maximal number of incoming connections that a Postfix daemon
              process will service before terminating voluntarily.

       <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
              The process ID of a Postfix command or daemon process.

       <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 directory.

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

       Available in Postfix 3.3 and later:

       <b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
              The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.

<b>SEE ALSO</b>
       <a href="qmgr.8.html">qmgr(8)</a>, queue manager
       <a href="bounce.8.html">bounce(8)</a>, delivery status reports
       <a href="error.8.html">error(8)</a>, Postfix error delivery agent
       <a href="postconf.5.html">postconf(5)</a>, configuration parameters
       <a href="master.5.html">master(5)</a>, generic daemon options
       <a href="master.8.html">master(8)</a>, process manager
       <a href="postlogd.8.html">postlogd(8)</a>, Postfix logging
       syslogd(8), system logging

<b>LICENSE</b>
       The Secure Mailer license must be distributed with this software.

<b>HISTORY</b>
       This service was introduced with Postfix version 2.2.

<b>AUTHOR(S)</b>
       Victor Duchovni
       Morgan Stanley

       Based on code by:
       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

                                                                    DISCARD(8)
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