Receiving server bounces e-mail (e.g. due to wrong recipient) and gives back a bounce-mail with sender e-mail firstname.lastname@example.org
What actually happens is, the receiving server gives back a bounce with „mx1.dzhyp.de“ or „mx2.dzhyp.de“ (the public hostnames) as sender-domain. This leads of course to SPF failures for the bounce e-mails:
We’ve established this setting on the network listener used to being reached out from the internet:
We’ve also tried the setting „work queue“ without any change in the behavior.
This is the Bounce profile beeing used:
And these are the bounce addresses, which should be used:
I currently cannot find the root cause of this connection behavior and hope, you can help me.