I hope somebody can help me in regards of this topic.
I have configured the sending of emails via postfix over relay account definde within smtp_auth. Based on that I get error message with logfile Mail.info. The server checking in someway the mail record:
Jul 24 12:02:46 mail postfix/smtp: warning: no MX host for htm176.htm-server.de has a valid address record
Jul 24 12:02:46 mail postfix/smtp: warning: relayhost configuration problem
Jul 24 12:02:46 mail postfix/smtp: E62782FF266: email@example.com, relay=none, delay=2369, delays=2369/0.11/0.01/0, dsn=4.3.5, status=deferred (Host or domain name not found. Name service error for name=htm410.htm-serve.de type=A: Host not found)
Variable set to:
If I configure the mail sending via a different smtp server (test with strato) the server selects the mail relay host in right way an send mail out to other account:
If I connecting outlook direct to the mail account htm176.htm-server.de I can send mails out to other addresses with Outlook by using the same smtp server (htm176.htm-server.de) but if I use the mail relay from Postfix I get such error record. Is it possible to prevent that the postfix checking the MX record?