On Thu, 4 Feb 2016, Reindl Harald wrote:
DMARC is a combination of SPF and DKIM plus From: header spoofing check.
You must get SPF and DKIM setup before adding the '_dmarc' DNS record for
the sending domain
tell me something new
wait i tell you something (for you) new: DMARC and mailing-lists is a awful
topic - what do you think would have happened with you mail to the list if
your domain would enforce DMARC and my MX reject mails violating the policy?
It's true that forwarding/maillists mangle SPF however unless the list does the
idiocy of subject munging (pre-pending '[list-name]' to the subject) DKIM should
pass thru lists unscathed.
So if your DMARC policiy is to accept on SPF -or- DKIM success then you should
have no worries. If you demand SPF -and- DKIM then good luck to you.
--
Dave Funk University of Iowa
<dbfunk (at) engineering.uiowa.edu> College of Engineering
319/335-5751 FAX: 319/384-0549 1256 Seamans Center
Sys_admin/Postmaster/cell_admin Iowa City, IA 52242-1527
#include <std_disclaimer.h>
Better is not better, 'standard' is better. B{
