DISCARD(8)DISCARD(8)NAMEdiscard - Postfix discard mail delivery agent
SYNOPSISdiscard [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 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" domain or host information as the
reason for discarding the mail, updates the queue file and marks recip‐
ients 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.
The discard(8) mailer is not security-sensitive. It does not talk to
the network, and can be run chrooted at fixed low privilege.
Problems and transactions are logged to syslogd(8).
Depending on the setting of the notify_classes parameter, the postmas‐
ter is notified of bounces and of other trouble.
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‐
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 log‐
ging sub-second delay values.
The sender address of postmaster notifications that are gener‐
ated 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 an incoming connection before terminating voluntarily.
The maximal number of incoming connections that a Postfix daemon
process will service before terminating voluntarily.
The process ID of a Postfix command or daemon process.
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.
The syslog facility of Postfix logging.
syslog_name (see 'postconf -d' output)
The mail system name that is prepended to the process name in
syslog records, so that "smtpd" becomes, for example, "post‐
SEE ALSOqmgr(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