discard - Postfix discard mail delivery agent
discard [generic Postfix daemon options]
The Postfix discard
(8) 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 discarding the mail,
and recipient information. The reason may be prefixed with an RFC
3463-compatible detail code. This program expects to be run from the
(8) process manager.
(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 recipients as
finished or informs the queue manager that delivery should be tried again at a
Delivery status reports are sent to the trace
(8) daemon as appropriate.
(8) mailer is not security-sensitive. It does not talk to the
network, and can be run chrooted at fixed low privilege.
RFC 3463 (Enhanced Status Codes)
Problems and transactions are logged to syslogd
Depending on the setting of the notify_classes
parameter, the postmaster
is notified of bounces and of other trouble.
Changes to main.cf
are picked up automatically as discard
processes run for only a limited amount of time. Use the command "
" to speed up a change.
The text below provides only a parameter summary. See postconf
more details including examples.
- config_directory (see 'postconf -d' output)
- The default location of the Postfix main.cf and master.cf
- daemon_timeout (18000s)
- How much time a Postfix daemon process may take to handle a
request 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
logging sub-second delay values.
- double_bounce_sender (double-bounce)
- The sender address of postmaster notifications that are
generated by the mail system.
- ipc_timeout (3600s)
- The time limit for sending or receiving information over an
internal communication channel.
- max_idle (100s)
- The maximum amount of time that an idle Postfix daemon
process waits for an incoming connection before terminating
- 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
- 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
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
syslogd(8), system logging
The Secure Mailer license must be distributed with this software.
This service was introduced with Postfix version 2.2.
Based on code by:
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
111 8th Avenue
New York, NY 10011, USA