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DISCARD(8) System Manager's Manual DISCARD(8) NAME discard - Postfix discard mail delivery agent SYNOPSIS discard [generic Postfix daemon options] DESCRIPTION The Postfix discard(8) delivery agent processes delivery requests from the queue manager. Each request specifies a queue file, a sender ad- dress, 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 RFC 3463-compatible detail code. This program expects to be run from the master(8) process manager. The discard(8) 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 trace(8) daemon as appropriate. SECURITY The discard(8) mailer is not security-sensitive. It does not talk to the network, and can be run chrooted at fixed low privilege. STANDARDS RFC 3463 (Enhanced Status Codes) DIAGNOSTICS Problems and transactions are logged to syslogd(8) or postlogd(8). Depending on the setting of the notify_classes parameter, the postmas- ter is notified of bounces and of other trouble. CONFIGURATION PARAMETERS Changes to main.cf are picked up automatically as discard(8) processes run for only a limited amount of time. Use the command "postfix reload" to speed up a change. The text below provides only a parameter summary. See postconf(5) for more details including examples. config_directory (see 'postconf -d' output) The default location of the Postfix main.cf and master.cf con- figuration files. daemon_timeout (18000s) How much time a Postfix daemon process may take to handle a re- quest before it is terminated by a built-in watchdog timer. delay_logging_resolution_limit (2) The maximal number of digits after the decimal point when log- ging sub-second delay values. double_bounce_sender (double-bounce) The sender address of postmaster notifications that are gener- ated by the mail system. ipc_timeout (3600s) The time limit for sending or receiving information over an in- ternal communication channel. max_idle (100s) The maximum amount of time that an idle Postfix daemon process waits for an incoming connection before terminating voluntarily. max_use (100) The maximal number of incoming connections that a Postfix daemon process will service before terminating voluntarily. process_id (read-only) The process ID of a Postfix command or daemon process. process_name (read-only) The process name of a Postfix command or daemon process. queue_directory (see 'postconf -d' output) The location of the Postfix top-level queue directory. syslog_facility (mail) The syslog facility of Postfix logging. syslog_name (see 'postconf -d' output) 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: service_name (read-only) The master.cf service name of a Postfix daemon process. SEE ALSO qmgr(8), queue manager bounce(8), delivery status reports error(8), Postfix error delivery agent postconf(5), configuration parameters master(5), generic daemon options master(8), process manager postlogd(8), Postfix logging syslogd(8), system logging LICENSE The Secure Mailer license must be distributed with this software. HISTORY This service was introduced with Postfix version 2.2. AUTHOR(S) 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)
NAME | SYNOPSIS | DESCRIPTION | SECURITY | STANDARDS | DIAGNOSTICS | CONFIGURATION PARAMETERS | SEE ALSO | LICENSE | HISTORY | AUTHOR(S)
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