Hi,
I noticed than my public key for my mail server was wrong… thanks to this post Email Blacklisté - Signature DKIM non valide I tested it with: https://www.mail-tester.com/
So, if I did it wrong, I assume other users can do the same mistakes
For a first version, I think:
- Test server’ ipv4 and ipv6 address, and check if it the same with the dns record
- Check if dkim and dmarc are correctly set
For improvements, it could probably be interesting to check config files and dns records use same port. I have no other ideas, but I’m sure someone will
thanks for this great tool