> You can easily verify in Postfix logs that smtp_destination_rate_delay > works.
I must have done something wrong because it does not seem to behave correctly. I’ve added this config to main.cf: smtp_destination_concurrency_limit = 4 smtp_destination_rate_delay = 1s libero_destination_concurrency_limit = 2 libero_destination_rate_delay = 6s alice_destination_concurrency_limit = 1 alice_destination_rate_delay = 7s turtle_destination_concurrency_limit = 2 turtle_destination_rate_delay = 6s the first two are for this thread, while the following are custom transport for specific domains. in master.cf I’ve restored the standard smtp transport, with the additional ones above. When I flush the queue for the exact same time (15:47:16) I’m getting 15 attempted connections: Jan 3 15:47:16 www postfix/smtp[7684]: connect to mail.testowe24.pl[151.80.202.137]:25: Connection refused Jan 3 15:47:16 www postfix/smtp[7684]: 8BC90602808: to=<censor...@testowe24.pl>, relay=none, delay=19636, delays=19636/0.07/0.03/0, dsn=4.4.1, status=deferred (connect to mail.testowe24.pl[151.80.202.137]:25: Connection refused) Jan 3 15:47:16 www postfix/smtp[7684]: 891FB602AD2: to=<censor...@cbdolejki.pl>, relay=none, delay=19383, delays=19383/0.11/0.01/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=cbdolejki.pl type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7698]: connect to blertyd.eu[198.37.114.34]:25: Connection refused Jan 3 15:47:16 www postfix/smtp[7698]: 40E52602A5A: to=<censor...@blertyd.eu>, relay=none, delay=19389, delays=19389/0.03/0.33/0, dsn=4.4.1, status=deferred (connect to blertyd.eu[198.37.114.34]:25: Connection refused) Jan 3 15:47:16 www postfix/smtp[7691]: 290A3602C20: host ksg.ovh[2001:41d0:8:6f14::1] said: 454 4.7.1 <clea...@ksg.ovh>: Relay access denied (in reply to RCPT TO command) Jan 3 15:47:16 www postfix/smtp[7705]: C6A14602B99: to=<censor...@tepgames.com>, relay=tepgames.com[212.129.45.37]:25, delay=19329, delays=19329/0.04/0.22/0, dsn=4.4.2, status=deferred (lost connection with tepgames.com[212.129.45.37] while receiving the initial server greeting) Jan 3 15:47:16 www postfix/smtp[7690]: 84507602EA2: to=<censor...@maastera.info>, relay=none, delay=19195, delays=19194/0.11/0.59/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=maastera.info type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7680]: 37357602E3E: to=<censor...@ruks.info>, relay=none, delay=19197, delays=19197/0.04/0.72/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=ruks.info type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7681]: 3E102602E50: to=<censor...@lupiko.info>, relay=none, delay=19196, delays=19196/0.04/0.72/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=lupiko.info type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7698]: connect to gigsme.com[46.166.189.98]:25: Connection refused Jan 3 15:47:16 www postfix/smtp[7698]: D49CC6029B8: to=<censor...@gigsme.com>, relay=none, delay=19504, delays=19504/0.02/0.16/0, dsn=4.4.1, status=deferred (connect to gigsme.com[46.166.189.98]:25: Connection refused) Jan 3 15:47:16 www postfix/smtp[7706]: CF54E602725: to=<censo...@alice.it>, relay=smtp.aliceposta.it[82.57.200.133]:25, delay=19756, delays=19756/0.02/0.09/0.22, dsn=2.0.0, status=sent (250 <5B8F9E5B1C3DBF1D> Mail accepted) Jan 3 15:47:16 www postfix/smtp[7686]: 883EF602DF3: to=<censor...@nulki.info>, relay=none, delay=19196, delays=19195/0.08/0.7/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=nulki.info type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7684]: 850AB602A65: to=<censor...@mailbox.co.pl>, relay=none, delay=19385, delays=19384/0.12/0.66/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=mailbox.co.pl type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7699]: E63A46029A5: to=<censor...@przedszkole-pruszkow.pl>, relay=none, delay=19505, delays=19504/0.02/0.56/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=przedszkole-pruszkow.pl type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7691]: 290A3602C20: to=<censor...@ksg.ovh>, relay=ksg.ovh[37.59.52.20]:25, delay=19316, delays=19315/0.08/0.72/0.03, dsn=4.7.1, status=deferred (host ksg.ovh[37.59.52.20] said: 454 4.7.1 <clea...@ksg.ovh>: Relay access denied (in reply to RCPT TO command)) Jan 3 15:47:16 www postfix/smtp[7700]: EF46B602D05: to=<censor...@miagency.co.pl>, relay=none, delay=19267, delays=19266/0.04/0.62/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=miagency.co.pl type=MX: Host not found, try again) Jan 3 15:47:16 www postfix/smtp[7704]: C5BF2602947: to=<censor...@emailvip.co.pl>, relay=none, delay=19498, delays=19498/0.03/0.61/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=emailvip.co.pl type=MX: Host not found, try again) Did I do something wrong or misunderstood the behaviour? thanks
