3 ms·

So add a message id at the first stop, or hard ban the sender server version until they confirm. A midway point that involves a doom switch is not a good option

• geocar 8mo ago
  > So add a message id at the first stop That should have already happened. Google is not the "first stop". > hard ban the sender server version until they confirm SMTP clients do not announce their version. Also I don't work for you, stop telling me what to do. > A midway point that involves a doom switch is not a good option. No shit. That's almost certainly a big part of why Google blocks messages from being transited without a Message-ID.