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<title> Postfix manual - bounce(8) </title>
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bounce - Postfix message bounce or defer daemon
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<b>bounce</b> [generic Postfix daemon options]
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The <b>bounce</b> daemon maintains per-message log files with
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non-delivery status information. Each log file is named
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after the queue file that it corresponds to, and is kept
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in a queue subdirectory named after the service name in
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the <b>master.cf</b> file (either <b>bounce</b>, <b>defer</b> or <b>trace</b>). This
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program expects to be run from the <a href="master.8.html"><b>master</b>(8)</a> process man-
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The <b>bounce</b> daemon processes two types of service requests:
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<b>o</b> Append a recipient (non-)delivery status record to
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a per-message log file.
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<b>o</b> Enqueue a bounce message, with a copy of a per-mes-
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sage log file and of the corresponding message.
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When the bounce message is enqueued successfully,
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the per-message log file is deleted.
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The software does a best notification effort. A non-deliv-
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ery notification is sent even when the log file or the
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original message cannot be read.
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Optionally, a bounce (defer, trace) client can request
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that the per-message log file be deleted when the
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requested operation fails. This is used by clients that
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cannot retry transactions by themselves, and that depend
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on retry logic in their own client.
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<a href="http://www.faqs.org/rfcs/rfc822.html">RFC 822</a> (ARPA Internet Text Messages)
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<a href="http://www.faqs.org/rfcs/rfc1894.html">RFC 1894</a> (Delivery Status Notifications)
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<a href="http://www.faqs.org/rfcs/rfc2045.html">RFC 2045</a> (Format of Internet Message Bodies)
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Problems and transactions are logged to <b>syslogd</b>(8).
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<b>CONFIGURATION PARAMETERS</b>
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Changes to <b>main.cf</b> are picked up automatically, as
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<a href="bounce.8.html">bounce(8)</a> processes run for only a limited amount of time.
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Use the command "<b>postfix reload</b>" to speed up a change.
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The text below provides only a parameter summary. See
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<a href="postconf.5.html">postconf(5)</a> for more details including examples.
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<b><a href="postconf.5.html#2bounce_notice_recipient">2bounce_notice_recipient</a> (postmaster)</b>
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The recipient of undeliverable mail that cannot be
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returned to the sender.
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<b><a href="postconf.5.html#backwards_bounce_logfile_compatibility">backwards_bounce_logfile_compatibility</a> (yes)</b>
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Produce additional <a href="bounce.8.html">bounce(8)</a> logfile records that
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can be read by older Postfix versions.
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<b><a href="postconf.5.html#bounce_notice_recipient">bounce_notice_recipient</a> (postmaster)</b>
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The recipient of postmaster notifications with the
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message headers of mail that Postfix did not
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deliver and of SMTP conversation transcripts of
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mail that Postfix did not receive.
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<b><a href="postconf.5.html#bounce_size_limit">bounce_size_limit</a> (50000)</b>
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The maximal amount of original message text that is
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sent in a non-delivery notification.
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<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
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The default location of the Postfix main.cf and
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master.cf configuration files.
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<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
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How much time a Postfix daemon process may take to
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handle a request before it is terminated by a
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built-in watchdog timer.
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<b><a href="postconf.5.html#delay_notice_recipient">delay_notice_recipient</a> (postmaster)</b>
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The recipient of postmaster notifications with the
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message headers of mail that cannot be delivered
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within $<a href="postconf.5.html#delay_warning_time">delay_warning_time</a> time units.
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<b><a href="postconf.5.html#deliver_lock_attempts">deliver_lock_attempts</a> (20)</b>
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The maximal number of attempts to acquire an exclu-
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sive lock on a mailbox file or <a href="bounce.8.html">bounce(8)</a> logfile.
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<b><a href="postconf.5.html#deliver_lock_delay">deliver_lock_delay</a> (1s)</b>
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The time between attempts to acquire an exclusive
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lock on a mailbox file or <a href="bounce.8.html">bounce(8)</a> logfile.
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<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
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The time limit for sending or receiving information
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over an internal communication channel.
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<b><a href="postconf.5.html#mail_name">mail_name</a> (Postfix)</b>
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The mail system name that is displayed in Received:
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headers, in the SMTP greeting banner, and in
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<b><a href="postconf.5.html#max_idle">max_idle</a> (100s)</b>
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The maximum amount of time that an idle Postfix
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daemon process waits for the next service request
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<b><a href="postconf.5.html#max_use">max_use</a> (100)</b>
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The maximal number of connection requests before a
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Postfix daemon process terminates.
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<b><a href="postconf.5.html#notify_classes">notify_classes</a> (resource, software)</b>
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The list of error classes that are reported to the
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<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
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The process ID of a Postfix command or daemon pro-
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<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
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The process name of a Postfix command or daemon
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<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
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The location of the Postfix top-level queue direc-
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<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
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The syslog facility of Postfix logging.
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<b><a href="postconf.5.html#syslog_name">syslog_name</a> (postfix)</b>
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The mail system name that is prepended to the pro-
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cess name in syslog records, so that "smtpd"
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becomes, for example, "postfix/smtpd".
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/var/spool/postfix/bounce/* non-delivery records
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/var/spool/postfix/defer/* non-delivery records
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/var/spool/postfix/trace/* delivery status records
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<a href="qmgr.8.html">qmgr(8)</a>, queue manager
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<a href="postconf.5.html">postconf(5)</a>, configuration parameters
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<a href="master.8.html">master(8)</a>, process manager
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syslogd(8), system logging
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The Secure Mailer license must be distributed with this
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IBM T.J. Watson Research
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Yorktown Heights, NY 10598, USA
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