On 5/23/25 1:49 PM, William Herrin wrote:
On Fri, May 23, 2025 at 7:09 AM Michael Thomas via NANOG
<[email protected]> wrote:
I'm using Thunderbird to read mail and lately the only thing I've seen
in the mail.from address is
|North American Network Operators Group |
and not the author's address which makes it really hard to tell who is
talking to whom.
I is just me, or has there been a list config change that is causing this?
It's not just you. The "From:" header is being changed to:
From: Your Name via NANOG <[email protected]>
I understand this has to do with DKIM crappiness where if any trace of
the original email address remains in the From: header, the message
may be rejected.
Not DKIM, DMARC to be more precise. I'm certain that close all of the
domains people are sending from if they have a DMARC record, it's p=none
which shouldn't trigger the 822.From rewrite, but that's what seems to
be happening.
Mike
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