# DISCARD - Postfix discard mail delivery agent - man(8postfix) - [phpMan]

[_DISCARD_(8postfix)](https://www.chedong.com/phpMan.php/man/DISCARD/8postfix/markdown)                                                                  [_DISCARD_(8postfix)](https://www.chedong.com/phpMan.php/man/DISCARD/8postfix/markdown)

## NAME
       discard - Postfix discard mail delivery agent

## SYNOPSIS
       **discard **[generic Postfix daemon options]

## DESCRIPTION
       The  Postfix  [**discard**(8)](https://www.chedong.com/phpMan.php/man/discard/8/markdown)  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)](https://www.chedong.com/phpMan.php/man/master/8/markdown)
       process manager.

       The  [**discard**(8)](https://www.chedong.com/phpMan.php/man/discard/8/markdown)  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)](https://www.chedong.com/phpMan.php/man/trace/8/markdown) daemon as appropriate.

## SECURITY
       The [**discard**(8)](https://www.chedong.com/phpMan.php/man/discard/8/markdown) 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)](https://www.chedong.com/phpMan.php/man/syslogd/8/markdown) or [**postlogd**(8)](https://www.chedong.com/phpMan.php/man/postlogd/8/markdown).

       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)](https://www.chedong.com/phpMan.php/man/discard/8/markdown) 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)](https://www.chedong.com/phpMan.php/man/postconf/5/markdown) 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 ter‐
              minated 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  exam‐
              ple, "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)](https://www.chedong.com/phpMan.php/man/qmgr/8/markdown), queue manager
       [bounce(8)](https://www.chedong.com/phpMan.php/man/bounce/8/markdown), delivery status reports
       [error(8)](https://www.chedong.com/phpMan.php/man/error/8/markdown), Postfix error delivery agent
       [postconf(5)](https://www.chedong.com/phpMan.php/man/postconf/5/markdown), configuration parameters
       [master(5)](https://www.chedong.com/phpMan.php/man/master/5/markdown), generic daemon options
       [master(8)](https://www.chedong.com/phpMan.php/man/master/8/markdown), process manager
       [postlogd(8)](https://www.chedong.com/phpMan.php/man/postlogd/8/markdown), Postfix logging
       [syslogd(8)](https://www.chedong.com/phpMan.php/man/syslogd/8/markdown), 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_(8postfix)](https://www.chedong.com/phpMan.php/man/DISCARD/8postfix/markdown)