On 19/01/2024 00:33, Randolf Richardson, Postmaster via mailop wrote: > The blacklists seem to be blocking mostly the ones that send > directly from @<something-strange>.onmicrosoft.com addresses, which > should make filtering easy if we can confirm for certain that no > legitimate eMail has these as the sender -- that is, not in the > "Return-Path:" header and not in the "From:" header.
I have a legitimate email today from @example.onmicrosoft.com (both envelope sender and From: header) that is a cross-organisation meeting invite. Normally all of their email uses their domain but some Microsoft software is using this internal domain for meeting invites. Indiscriminate blocking is going to unexpectedly reject real email. -- Simon Arlott _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
