discard



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 dis-
       carding the mail, and recipient information.  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.


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 postmas-
       ter 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 examples.

       config_directory (see postconf -d output)
              The  default  location of the Postfix main.cf and master.cf con-
              figuration 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.

       double_bounce_sender (double-bounce)
              The  sender  address of postmaster notifications that are gener-
              ated 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 the next service request before exiting.

       max_use (100)
              The maximal number of connection requests before a Postfix  dae-
              mon process terminates.

       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 (postfix)
              The  mail  system  name that is prepended to the process name in
              syslog records, so that "smtpd"  becomes,  for  example,  "post-
              fix/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)

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