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DISCARD(8)		    System Manager's Manual		    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  ad-
       dress,  a  next-hop  destination	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" destination as	the reason for
       discarding the mail, updates the	queue file, and	either	marks  recipi-
       ents  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
       RFC 3463	(Enhanced Status Codes)

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  re-
	      quest 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 log-
	      ging sub-second delay values.

       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 in-
	      ternal 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)
	      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)

NAME | SYNOPSIS | DESCRIPTION | SECURITY | STANDARDS | DIAGNOSTICS | CONFIGURATION PARAMETERS | SEE ALSO | LICENSE | HISTORY | AUTHOR(S)

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