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flush [generic Postfix daemon options]
The record is implemented as a per-destination logfile with as contents the queue IDs of deferred mail. A logfile is append-only, and is truncated when delivery is requested for the corresponding destination. A destination is the part on the right-hand side of the right-most @ in an email address.
Per-destination logfiles of deferred mail are maintained only for eligible destinations. The list of eligible destinations is specified with the fast_flush_domains configuration parameter, which defaults to $relay_domains.
This server implements the following requests:
|add sitename queueid||Inform the flush(8) server that the message with the specified queue ID is queued for the specified destination.|
|send sitename||Request delivery of mail that is queued for the specified destination.|
Refresh non-empty per-destination logfiles that were not read in
$fast_flush_refresh_time hours, by simulating
send requests (see above) for the corresponding destinations.
Delete empty per-destination logfiles that were not updated in $fast_flush_purge_time days.
This request completes in the background.
|purge||Do a refresh for all per-destination logfiles.|
Upon receipt of a request to deliver mail for an eligible destination, the flush(8) server requests delivery of all messages that are listed in that destinations logfile, regardless of the recipients of those messages. This is not an issue for mail that is sent to a relay_domains destination because such mail typically only has recipients in one domain.
The text below provides only a parameter summary. See postconf(5) for more details including examples.
|config_directory (see postconf -d output)||The default location of the Postfix main.cf and master.cf configuration files.|
|daemon_timeout (18000s)||How much time a Postfix daemon process may take to handle a request before it is terminated by a built-in watchdog timer.|
|fast_flush_domains ($relay_domains)||Optional list of destinations that are eligible for per-destination logfiles with mail that is queued to those destinations.|
|fast_flush_refresh_time (12h)||The time after which a non-empty but unread per-destination "fast flush" logfile needs to be refreshed.|
|fast_flush_purge_time (7d)||The time after which an empty per-destination "fast flush" logfile is deleted.|
|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 daemon process terminates.|
|parent_domain_matches_subdomains (see postconf -d output)||What Postfix features match subdomains of "domain.tld" automatically, instead of requiring an explicit ".domain.tld" pattern.|
|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, "postfix/smtpd".|
/var/spool/postfix/flush, "fast flush" logfiles.
smtpd(8), SMTP server qmgr(8), queue manager postconf(5), configuration parameters master(5), generic daemon options master(8), process manager syslogd(8), system logging
ETRN_README, Postfix ETRN howto
This service was introduced with Postfix version 1.0.
Wietse Venema IBM T.J. Watson Research P.O. Box 704 Yorktown Heights, NY 10598, USA
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