134 lines
6.6 KiB
HTML
134 lines
6.6 KiB
HTML
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<html> <head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link rel='stylesheet' type='text/css' href='postfix-doc.css'>
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<title> Postfix manual - discard(8) </title>
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</head> <body> <pre>
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DISCARD(8) DISCARD(8)
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<b><a name="name">NAME</a></b>
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discard - Postfix discard mail delivery agent
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<b><a name="synopsis">SYNOPSIS</a></b>
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<b>discard</b> [generic Postfix daemon options]
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<b><a name="description">DESCRIPTION</a></b>
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The Postfix <a href="discard.8.html"><b>discard</b>(8)</a> delivery agent processes delivery requests from
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the queue manager. Each request specifies a queue file, a sender
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address, a next-hop destination that is treated as the reason for dis-
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carding the mail, and recipient information. The reason may be pre-
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fixed with an <a href="https://tools.ietf.org/html/rfc3463">RFC 3463</a>-compatible detail code. This program expects to
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be run from the <a href="master.8.html"><b>master</b>(8)</a> process manager.
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The <a href="discard.8.html"><b>discard</b>(8)</a> delivery agent pretends to deliver all recipients in the
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delivery request, logs the "next-hop" destination as the reason for
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discarding the mail, updates the queue file, and either marks recipi-
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ents as finished or informs the queue manager that delivery should be
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tried again at a later time.
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Delivery status reports are sent to the <a href="trace.8.html"><b>trace</b>(8)</a> daemon as appropriate.
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<b><a name="security">SECURITY</a></b>
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The <a href="discard.8.html"><b>discard</b>(8)</a> mailer is not security-sensitive. It does not talk to
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the network, and can be run chrooted at fixed low privilege.
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<b><a name="standards">STANDARDS</a></b>
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<a href="https://tools.ietf.org/html/rfc3463">RFC 3463</a> (Enhanced Status Codes)
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<b><a name="diagnostics">DIAGNOSTICS</a></b>
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Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>.
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Depending on the setting of the <b><a href="postconf.5.html#notify_classes">notify_classes</a></b> parameter, the postmas-
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ter is notified of bounces and of other trouble.
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<b><a name="configuration_parameters">CONFIGURATION PARAMETERS</a></b>
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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
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run for only a limited amount of time. Use the command "<b>postfix reload</b>"
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to speed up a change.
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The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for
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more details including examples.
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<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
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The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
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figuration files.
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<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
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How much time a Postfix daemon process may take to handle a
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request before it is terminated by a built-in watchdog timer.
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<b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b>
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The maximal number of digits after the decimal point when log-
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ging sub-second delay values.
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<b><a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a> (double-bounce)</b>
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The sender address of postmaster notifications that are gener-
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ated by the mail system.
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<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
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The time limit for sending or receiving information over an
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internal communication channel.
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<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
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The maximum amount of time that an idle Postfix daemon process
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waits for an incoming connection before terminating voluntarily.
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<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
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The maximal number of incoming connections that a Postfix daemon
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process will service before terminating voluntarily.
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<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
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The process ID of a Postfix command or daemon process.
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<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
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The process name of a Postfix command or daemon process.
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<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
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The location of the Postfix top-level queue directory.
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<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
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The syslog facility of Postfix logging.
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<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
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A prefix that is prepended to the process name in syslog
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records, so that, for example, "smtpd" becomes "prefix/smtpd".
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Available in Postfix 3.3 and later:
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<b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
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The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.
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<b><a name="see_also">SEE ALSO</a></b>
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<a href="qmgr.8.html">qmgr(8)</a>, queue manager
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<a href="bounce.8.html">bounce(8)</a>, delivery status reports
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<a href="error.8.html">error(8)</a>, Postfix error delivery agent
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<a href="postconf.5.html">postconf(5)</a>, configuration parameters
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<a href="master.5.html">master(5)</a>, generic daemon options
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<a href="master.8.html">master(8)</a>, process manager
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<a href="postlogd.8.html">postlogd(8)</a>, Postfix logging
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syslogd(8), system logging
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<b><a name="license">LICENSE</a></b>
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The Secure Mailer license must be distributed with this software.
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<b><a name="history">HISTORY</a></b>
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This service was introduced with Postfix version 2.2.
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<b>AUTHOR(S)</b>
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Victor Duchovni
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Morgan Stanley
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Based on code by:
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Wietse Venema
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IBM T.J. Watson Research
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P.O. Box 704
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Yorktown Heights, NY 10598, USA
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Wietse Venema
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Google, Inc.
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111 8th Avenue
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New York, NY 10011, USA
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DISCARD(8)
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</pre> </body> </html>
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