Re: is it just me or...

[Michael Thomas via NANOG <nanog () lists nanog org>]

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

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