DISCARD
Section: Maintenance Commands (8)
Page Index
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
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
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 recipients 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 postmaster 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
configuration files.
- 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 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