Hi > Can you answer one question: is mail arriving too fast, or are > > deliveries too slow? If the problem is the latter, then your queue > > may be full of MAILER-DAEMON messages. > > We have a solution for that, and that is not slowing down message > > arrivals or speeding up deliveries.
Mails are arriving fast, they arrive quicly enough to fill the active queue. Le 2023-09-29T16:34:50.000+02:00, Wietse Venema via Postfix-users <postfix-users@postfix.org> a écrit : > Wietse Venema via Postfix-users: >> Kevin Cousin via Postfix-users: >> >>> Greetings List, >>> >>> We recently had an issue and the active queue was full and >>> slowed >>> >>> down all new mail delivery. Is it possible to rate limit the >>> mail >>> >>> flow to protect smtpd from a massive mail input ? >> >> By default, the Postfix SMTP server enforces in_flow_delay (1 >> second) >> >> when the received message rate exceeds the delivered message >> rate. >> >> in_flow_delay (default: 1s) >> >> Time to pause before accepting a new message, when the message >> arrival >> >> rate exceeds the message delivery rate. This feature is turned on >> by >> >> default (it's disabled on SCO UNIX due to an SCO bug). >> >> With the default 100 Postfix SMTP server process limit, >> "in_flow_delay >> >> = 1s" limits the mail inflow to 100 messages per second above the >> num- >> >> ber of messages delivered per second. >> >> Specify 0 to disable the feature. Valid delays are 0..10. >> >> It's limited to 10s, because waiting much longer may cause >> clients >> >> to go away. Reducing the Postfix SMTP server process limit has a >> >> similar result as increasing the in_flow_delay. > > Can you answer one question: is mail arriving too fast, or are > > deliveries too slow? If the problem is the latter, then your queue > > may be full of MAILER-DAEMON messages. > > We have a solution for that, and that is not slowing down message > > arrivals or speeding up deliveries. > > Wietse > > _______________________________________________ > > Postfix-users mailing list -- postfix-users@postfix.org > > To unsubscribe send an email to postfix-users-le...@postfix.org
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