1DISCARD(8) System Manager's Manual DISCARD(8)
2
6 discard - Postfix discard mail delivery agent
7
9 discard [generic Postfix daemon options]
10
12 The Postfix discard(8) delivery agent processes delivery requests from
13 the queue manager. Each request specifies a queue file, a sender
14 address, a next-hop destination that is treated as the reason for dis‐
15 carding the mail, and recipient information. The reason may be pre‐
16 fixed with an RFC 3463-compatible detail code. This program expects to
17 be run from the master(8) process manager.
18 The discard(8) delivery agent pretends to deliver all recipients in the
20 delivery request, logs the "next-hop" destination as the reason for
21 discarding the mail, updates the queue file, and either marks recipi‐
22 ents as finished or informs the queue manager that delivery should be
23 tried again at a later time.
24 Delivery status reports are sent to the trace(8) daemon as appropriate.
26
28 The discard(8) mailer is not security-sensitive. It does not talk to
29 the network, and can be run chrooted at fixed low privilege.
30
32 RFC 3463 (Enhanced Status Codes)
33
35 Problems and transactions are logged to syslogd(8) or postlogd(8).
36 Depending on the setting of the notify_classes parameter, the postmas‐
38 ter is notified of bounces and of other trouble.
39
41 Changes to main.cf are picked up automatically as discard(8) processes
42 run for only a limited amount of time. Use the command "postfix reload"
43 to speed up a change.
44 The text below provides only a parameter summary. See postconf(5) for
46 more details including examples.
47 config_directory (see 'postconf -d' output)
49 The default location of the Postfix main.cf and master.cf con‐
50 figuration files.
51 daemon_timeout (18000s)
53 How much time a Postfix daemon process may take to handle a
54 request before it is terminated by a built-in watchdog timer.
55 delay_logging_resolution_limit (2)
57 The maximal number of digits after the decimal point when log‐
58 ging sub-second delay values.
59 double_bounce_sender (double-bounce)
61 The sender address of postmaster notifications that are gener‐
62 ated by the mail system.
63 ipc_timeout (3600s)
65 The time limit for sending or receiving information over an
66 internal communication channel.
67 max_idle (100s)
69 The maximum amount of time that an idle Postfix daemon process
70 waits for an incoming connection before terminating voluntarily.
71 max_use (100)
73 The maximal number of incoming connections that a Postfix daemon
74 process will service before terminating voluntarily.
75 process_id (read-only)
77 The process ID of a Postfix command or daemon process.
78 process_name (read-only)
80 The process name of a Postfix command or daemon process.
81 queue_directory (see 'postconf -d' output)
83 The location of the Postfix top-level queue directory.
84 syslog_facility (mail)
86 The syslog facility of Postfix logging.
87 syslog_name (see 'postconf -d' output)
89 A prefix that is prepended to the process name in syslog
90 records, so that, for example, "smtpd" becomes "prefix/smtpd".
91 Available in Postfix 3.3 and later:
93 service_name (read-only)
95 The master.cf service name of a Postfix daemon process.
96
98 qmgr(8), queue manager
99 bounce(8), delivery status reports
100 error(8), Postfix error delivery agent
101 postconf(5), configuration parameters
102 master(5), generic daemon options
103 master(8), process manager
104 postlogd(8), Postfix logging
105 syslogd(8), system logging
106
108 The Secure Mailer license must be distributed with this software.
109
111 This service was introduced with Postfix version 2.2.
112
114 Victor Duchovni
115 Morgan Stanley
116 Based on code by:
118 Wietse Venema
119 IBM T.J. Watson Research
120 P.O. Box 704
121 Yorktown Heights, NY 10598, USA
122 Wietse Venema
124 Google, Inc.
125 111 8th Avenue
126 New York, NY 10011, USA
127 DISCARD(8)