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DISCARD(8)                                                                                        DISCARD(8)



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 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-com-patible 3463-compatible
       patible 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 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
       None.

DIAGNOSTICS
       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 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  exam-ples. examples.
       ples.

       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  connec-tion connection
              tion 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)
              The mail system name that is prepended to the process name in syslog records, so that  "smtpd"
              becomes, for example, "postfix/smtpd".

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
       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



                                                                                                  DISCARD(8)