Few hours ago I upgrade from Postfix 3.5.4 to 3.5.5 and sometimes I get "Cannot start TLS: handshake failure":
------ Jul 26 13:21:10 smtp2 postfix/smtpd[26600]: 1DB241F4EA: client=server28.example.net[138.201.82.xxx] Jul 26 13:21:10 smtp2 postfix/cleanup[26147]: 1DB241F4EA: message-id=<f42ae274b54d32f368dd3897ee7c7...@www.example.com> Jul 26 13:21:10 smtp2 postfix/qmgr[1637]: 1DB241F4EA: from=<i...@example.com>, size=5509, nrcpt=1 (queue active) Jul 26 13:21:10 smtp2 relay2/smtp[26609]: 1DB241F4EA: to=<i...@example.org>, relay=mail.example.org[138.201.51.72]:25, delay=0.42, delays=0.4/0/0.02/0, dsn=4.7.5, status=deferred (Cannot start TLS: handshake failure) Jul 26 13:26:50 smtp2 postfix/qmgr[1637]: 1DB241F4EA: from=<i...@example.com>, size=5509, nrcpt=1 (queue active) Jul 26 13:26:50 smtp2 relay4/smtp[26535]: 1DB241F4EA: to=<i...@example.org>, relay=mail.example.org[138.201.51.72]:25, delay=341, delays=340/0/0.04/0.53, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 6F1B02869AA) Jul 26 13:26:50 smtp2 postfix/qmgr[1637]: 1DB241F4EA: removed ------ These messages are delivered the next time the sender SMTP tries to deliver the message. Also I use Monit to monitor Postfix and after the upgrade to 3.5.5 version I get messages like this: ------ Connection failed Service postfix Date: Sun, 26 Jul 2020 14:01:39 Action: restart Host: server28.example.com Description: failed protocol test [SMTP] at [127.0.0.1]:25 [TCP/IP] -- Error receiving data from the mailserver -- Resource temporarily unavailable ------ Is this a known issue?
