Domain of sender address does not resolve (in reply to MAIL FROM command)
- by horen
When sending out emails with postfix I sometimes get this error:
451 #4.1.8 Domain of sender address <[email protected]> does not resolve
(in reply to MAIL FROM command)
The domain mydomain.tld is resolvable though, meaning A, MX, PTR records are set properly.
However, the sending server does have a different domain anotherdomain.tld but it is allowed to send emails from mydomain.tld since I set the MX records of mydomain.tld to anotherdomain.tld. The envelope from of the problematic emails is [email protected].
Is there some other dns entry I have to set?
Or how else could I solve the problem? (I would like to keep the server structure though)