Not a bug per se: reverse dns of IPv4 broken

NOQUEUE: reject: RCPT from unknown[]: 450 4.7.1 Client host rejected:
  cannot find your hostname, []; from=<>
  to=<target@mail.address> proto=ESMTP helo=<>

IPv6 works properly, so i could actually receive the mail.

probably something for @sam

I am pretty sure we have been through this adventure once :slightly_smiling:

yeah i dont feel like fighting such fight atm. I will just finish with your admin is wrong.

I will keep the setting. Especially because the IPv6 part is configured properly.