discard - Postfix discard mail delivery agent

       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)

       Changes  to  main.cf are picked up automatically as discard(8) processes run for only a limited amount of
       time. Use the command "postfixreload" 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.

       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.

       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.

       This service was introduced with Postfix version 2.2.

       The Secure Mailer license must be distributed with this software.

       discard - Postfix discard mail delivery agent

       The discard(8) mailer is not security-sensitive. It does not talk to the network, and can be run chrooted
       at fixed low privilege.

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

       RFC 3463 (Enhanced Status Codes)

discard [generic Postfix daemon options]