On 5/23/25 1:49 PM, William Herrin wrote:
On Fri, May 23, 2025 at 7:09 AM Michael Thomas via NANOG <nanog@lists.nanog.org> 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 <nanog@lists.nanog.org>
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