Once upon a time, Bruno Wolff III <bruno(a)wolff.to> said:
On Sat, Jul 02, 2016 at 00:48:14 +0200,
Michael Scherer <misc(a)zarb.org> wrote:
>So that's rather fast to explain. Libero.it use this SPF record:
Isn't SPF tied to the envelope sender address and not the From:
header?
Yes. Like I said earlier, the problem is DMARC, which is based on the
header From: address. libero.it has the following DMARC policy record:
"v=DMARC1\; p=quarantine\; rua= mailto:dmarc_agg_rep@libero.it,
mailto:dmarc_agg@auth.returnpath.net\; "
So, their policy says that non-conforming messages should be quarantined
by receivers of those messages. Mailing lists that don't rewrite the
header From: address will cause messages from domains with DMARC
policies of quarantine or reject to be a problem for mail servers that
apply DMARC policies.
--
Chris Adams <linux(a)cmadams.net>