* William Herrin:
On Sun, Mar 2, 2025 at 10:55 AM Niels Bakker <niels=nanog@bakker.net> 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>