1<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "http://www.w3.org/TR/html4/loose.dtd"> 3<html> <head> 4<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> 5<title> Postfix manual - discard(8) </title> 6</head> <body> <pre> 7DISCARD(8) DISCARD(8) 8 9<b>NAME</b> 10 discard - Postfix discard mail delivery agent 11 12<b>SYNOPSIS</b> 13 <b>discard</b> [generic Postfix daemon options] 14 15<b>DESCRIPTION</b> 16 The Postfix <a href="discard.8.html"><b>discard</b>(8)</a> delivery agent processes delivery requests from 17 the queue manager. Each request specifies a queue file, a sender 18 address, a next-hop destination that is treated as the reason for dis- 19 carding the mail, and recipient information. The reason may be pre- 20 fixed with an <a href="http://tools.ietf.org/html/rfc3463">RFC 3463</a>-compatible detail code. This program expects to 21 be run from the <a href="master.8.html"><b>master</b>(8)</a> process manager. 22 23 The <a href="discard.8.html"><b>discard</b>(8)</a> delivery agent pretends to deliver all recipients in the 24 delivery request, logs the "next-hop" destination as the reason for 25 discarding the mail, updates the queue file, and either marks recipi- 26 ents as finished or informs the queue manager that delivery should be 27 tried again at a later time. 28 29 Delivery status reports are sent to the <a href="trace.8.html"><b>trace</b>(8)</a> daemon as appropriate. 30 31<b>SECURITY</b> 32 The <a href="discard.8.html"><b>discard</b>(8)</a> mailer is not security-sensitive. It does not talk to 33 the network, and can be run chrooted at fixed low privilege. 34 35<b>STANDARDS</b> 36 <a href="http://tools.ietf.org/html/rfc3463">RFC 3463</a> (Enhanced Status Codes) 37 38<b>DIAGNOSTICS</b> 39 Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>. 40 41 Depending on the setting of the <b><a href="postconf.5.html#notify_classes">notify_classes</a></b> parameter, the postmas- 42 ter is notified of bounces and of other trouble. 43 44<b>CONFIGURATION PARAMETERS</b> 45 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 46 run for only a limited amount of time. Use the command "<b>postfix reload</b>" 47 to speed up a change. 48 49 The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for 50 more details including examples. 51 52 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 53 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con- 54 figuration files. 55 56 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 57 How much time a Postfix daemon process may take to handle a 58 request before it is terminated by a built-in watchdog timer. 59 60 <b><a href="postconf.5.html#delay_logging_resolution_limit">delay_logging_resolution_limit</a> (2)</b> 61 The maximal number of digits after the decimal point when log- 62 ging sub-second delay values. 63 64 <b><a href="postconf.5.html#double_bounce_sender">double_bounce_sender</a> (double-bounce)</b> 65 The sender address of postmaster notifications that are gener- 66 ated by the mail system. 67 68 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 69 The time limit for sending or receiving information over an 70 internal communication channel. 71 72 <b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b> 73 The maximum amount of time that an idle Postfix daemon process 74 waits for an incoming connection before terminating voluntarily. 75 76 <b><a href="postconf.5.html#max_use">max_use</a> (100)</b> 77 The maximal number of incoming connections that a Postfix daemon 78 process will service before terminating voluntarily. 79 80 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 81 The process ID of a Postfix command or daemon process. 82 83 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 84 The process name of a Postfix command or daemon process. 85 86 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 87 The location of the Postfix top-level queue directory. 88 89 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 90 The syslog facility of Postfix logging. 91 92 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 93 A prefix that is prepended to the process name in syslog 94 records, so that, for example, "smtpd" becomes "prefix/smtpd". 95 96 Available in Postfix 3.3 and later: 97 98 <b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b> 99 The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process. 100 101<b>SEE ALSO</b> 102 <a href="qmgr.8.html">qmgr(8)</a>, queue manager 103 <a href="bounce.8.html">bounce(8)</a>, delivery status reports 104 <a href="error.8.html">error(8)</a>, Postfix error delivery agent 105 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 106 <a href="master.5.html">master(5)</a>, generic daemon options 107 <a href="master.8.html">master(8)</a>, process manager 108 <a href="postlogd.8.html">postlogd(8)</a>, Postfix logging 109 syslogd(8), system logging 110 111<b>LICENSE</b> 112 The Secure Mailer license must be distributed with this software. 113 114<b>HISTORY</b> 115 This service was introduced with Postfix version 2.2. 116 117<b>AUTHOR(S)</b> 118 Victor Duchovni 119 Morgan Stanley 120 121 Based on code by: 122 Wietse Venema 123 IBM T.J. Watson Research 124 P.O. Box 704 125 Yorktown Heights, NY 10598, USA 126 127 Wietse Venema 128 Google, Inc. 129 111 8th Avenue 130 New York, NY 10011, USA 131 132 DISCARD(8) 133</pre> </body> </html> 134