Heho, I am currently trying to debug a test for MTA-STS sending; The setup is a domain with an MX with an invalid certificate to test whether MTA-STS policies are honord (if they are, no mail should be received). I tested this last night with an ESP I know should be honoring MTA-STS; However, while the policy was retrieved from the webserver, the email got ultimately delivered. I also did not get an MTA-STS TLS-RPT, even though other domains got them from the same ESP today.
Could some of you who are on a setup that validates MTA-STS please try to send me an email to, and if it (hopefully) fails share the NDR?: measurem...@mail-mtasts.measurement.email-security-scans.org (Alternatively, if you see something wrong in the config, please let me know.) With best regards, Tobias _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
