Hello, While I have no insight into why Microsoft might've blocked this list, the mails I receive have invalid DKIM signatures. It appears the list retains the original DKIM signatures from the mail senders, rewrites the from address to [email protected], yet does not add its own DKIM signature for mailop.org. And mailop.org has a "quarantine" DMARC policy.
So, technically, all emails from this list should be DMARC-quarantined by DMARC-complying receivers. Of course, I can't say if fixing that will fix the issue with Microsoft, but it probably should be fixed. If the list rewrites messages, it should remove any DKIM signatures that it breaks and add its own ones for its own domain. -- Hanno Böck https://hboeck.de/ _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
