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NAMEflush - Postfix fast flush serverSYNOPSISflush [generic Postfix daemon options] DESCRIPTIONThe flush(8) server maintains a record of deferred mail by destination. This information is used to improve the performance of the SMTP ETRN request, and of its command-line equivalent, "sendmail -qR" or "postqueue -f". This program expects to be run from the master(8) process manager. 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:
SECURITYThe flush(8) server is not security-sensitive. It does not talk to the network, and it does not talk to local users. The fast flush server can run chrooted at fixed low privilege. DIAGNOSTICSProblems and transactions are logged to syslogd(8) or postlogd(8). BUGSFast flush logfiles are truncated only after a "send" request, not when mail is actually delivered, and therefore can accumulate outdated or redundant data. In order to maintain sanity, "refresh" must be executed periodically. This can be automated with a suitable wakeup timer setting in the master.cf configuration file. 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 destination's 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. CONFIGURATION PARAMETERSChanges to main.cf are picked up automatically as flush(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.
Available in Postfix 3.3 and later:
FILES/var/spool/postfix/flush, "fast flush" logfiles. SEE ALSOsmtpd(8), SMTP server qmgr(8), queue manager postconf(5), configuration parameters master(5), generic daemon options master(8), process manager postlogd(8), Postfix logging syslogd(8), system logging README FILESUse "postconf readme_directory" or "postconf html_directory" to locate this information. ETRN_README, Postfix ETRN howto LICENSEThe Secure Mailer license must be distributed with this software. HISTORYThis service was introduced with Postfix version 1.0. AUTHOR(S)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 Visit the GSP FreeBSD Man Page Interface. |