* William Herrin: > On Sun, Mar 2, 2025 at 10:55 AM Niels Bakker <[email protected]> wrote: >> | Subject: [NANOG]Re: >> >> Congrats on completing the move to Mailman 3 but is this Subject line >> mangling truly necessary? > > It has been standard for mailing lists for a quarter of a century now. > Isn't it time NANOG caught up with mailing list best practices?
Many mailing lists have moved away from Subject:/body rewriting because it breaks DKIM signatures and may prevent successful message delivery to recipients whose servers enforce the sender's DMARC policy. The alternative is to rewrite the From: line, at least for senders with restrictive DMARC policies, but this breaks other things. <https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/handlers/docs/dmarc-mitigations.html> _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/UPXKXFK4CKI7ZOWLPDFAOYNXGOVTUNYY/
