Hi all,
I have several emails being forwarded to my mailcow installation and have put the forwarding servers on the forwarding hosts list (I hope that is the correct english term, in the german installation it is called Weiterleitungs Hosts). Normally all mails being sent by those servers should be accepted and then processed by rspamd. This normally works. It just fails from time to time. Postfix recognizes the mails as whitelisted but then rejects them anyway. The Postfix log for such a mail looks like this:
28.11.2021, 13:30:57 info disconnect from mout-xforward.gmx.net[82.165.159.12] ehlo=2 starttls=1 mail=1 rcpt=1 data=0/1 quit=1 commands=6/7
28.11.2021, 13:30:57 info 3BEF72822FB: milter-reject: END-OF-MESSAGE from mout-xforward.gmx.net[82.165.159.12]: 5.7.1 This message does not meet our delivery requirements; from=<<mymail>@gmx.de> to=<<mymail>@<mymail>.de> proto=ESMTP helo=<mout-xforward.gmx.net>
28.11.2021, 13:30:55 info 3BEF72822FB: message-id=<mid-83d8841524ace00f6f6d0bd195c68318-1@ehremailling.de>
28.11.2021, 13:30:55 info 3BEF72822FB: client=mout-xforward.gmx.net[82.165.159.12]
28.11.2021, 13:30:54 info Anonymous TLS connection established from mout-xforward.gmx.net[82.165.159.12] to mail.<mymail>.de: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256
28.11.2021, 13:30:54 info connect from mout-xforward.gmx.net[82.165.159.12]
28.11.2021, 13:30:54 info WHITELISTED [82.165.159.12]:48579
28.11.2021, 13:30:54 info CONNECT from [82.165.159.12]:48579 to [172.22.1.253]:25
Has anyone seen anything similar?