I noticed many logs about rejecting emails from atlassian. Here a snipplet from my server-log:
May 30 09:37:34 mail postfix/postscreen: CONNECT from [188.8.131.52]:47641 to [10.10.10.3]:25
May 30 09:37:34 mail postfix/postscreen: PASS OLD [184.108.40.206]:47641
May 30 09:37:34 mail postfix/smtpd: warning: hostname mta2.e.atlassian.com does not resolve to address 220.127.116.11
May 30 09:37:34 mail postfix/smtpd: connect from unknown[18.104.22.168]
May 30 09:37:35 mail postfix/smtpd: NOQUEUE: reject: RCPT from unknown[22.214.171.124]: 450 4.7.25 Client host rejected: cannot find your hostname, [126.96.36.199]; from=<bounce-1441644_HTMLfirstname.lastname@example.org> to=<*********> proto=ESMTP helo=<mta.e.atlassian.com>
May 30 09:37:35 mail postfix/smtpd: disconnect from unknown[188.8.131.52] ehlo=2 starttls=1 mail=1 rcpt=0/1 quit=1 commands=5/6
So there is some problem with resolving hostname for mta2.e.atlassian.com. Whats wrong?
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