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 domain or host name 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"
domain or host information as the reason for discarding
the mail, updates the queue file and 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
The discard(8) mailer is not security-sensitive. It does
not talk to the network, and can be run chrooted at fixed
Problems and transactions are logged to syslogd(8).
Depending on the setting of the notify_classes parameter,
the postmaster is notified of bounces and of other trou-
Changes to main.cf are picked up automatically as dis-
card(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.
How much time a Postfix daemon process may take to
handle a request before it is terminated by a
built-in watchdog timer.
The maximal number of digits after the decimal
point when logging sub-second delay values.
The sender address of postmaster notifications that
are generated by the mail system.
The time limit for sending or receiving information
over an internal communication channel.
The maximum amount of time that an idle Postfix
daemon process waits for the next service request
The maximal number of connection requests before a
Postfix daemon process terminates.
The process ID of a Postfix command or daemon
The process name of a Postfix command or daemon
queue_directory (see 'postconf -d' output)
The location of the Postfix top-level queue direc-
The syslog facility of Postfix logging.
The mail system name that is prepended to the
process name in syslog records, so that "smtpd"
becomes, for example, "postfix/smtpd".
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
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