[NANOG]Re: Scheduled Maintenance Finished

[Florian Weimer <fw () deneb enyo de>]

* 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>
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