Re: dmarc failure when sending to the list

From: Murray S. Kucherawy <msk_at_blackops.org>
Date: Thu, 10 Jul 2014 21:15:47 -0700 (PDT)

On Thu, 10 Jul 2014, Patrick Proniewski wrote:
> yep, the full body is converted from quoted-printable to 8bit by the
> list server. And that bugs me a little bit. As I wrote earlier, I don't
> see any way to implement strict DKIM/DMARC policy (reject) if someone in
> the middle alter some content with - apparently - no reason.

It's a known exception with DMARC. With DKIM, it's expected; the common
wisdom is that the list signs the post-conversion copy, and you evaluate
the list signature rather than the author signature.

-MSK
Received on Fri Jul 11 2014 - 04:16:09 PST