Has anyone else had issues receiving emails from Office 365 or Outlook / Live Mail users when MTA-STS has been setup?
All tests I’ve run shows that my setup is good and I’m able to receive emails from GMail, GSuite Protonmail and other MTA-STS compliant email providers.
I can receive emails if I set the mode to “testing” in /var/lib/mailinabox/mta-sts.txt, but when I change back to “enforce”, no emails come in.
I get the below in the Office 365 Exchange message:
Reason: LED=450 4.4.317 Cannot connect to remote server [Message=451 4.4.8 MX hosts of ‘inoz.me’ failed MTA-STS validation.]