On Sun, Apr 13, 2014 at 4:54 PM, Joseph Brennan <bren...@columbia.edu> wrote: > > Jim Popovitch <jim...@gmail.com> wrote: > >> DMARC works off of SPF as well. > > > Not really.
DMARC checks alignment of *both* DKIM and SPF, if either is broken DMARC fails. > SPF does not check the "From:" header line, and that's where the > troubles begin with DMARC. SPF checks sending IPs (of which your IPs won't match Yahoo's, thus breaking DMARC) Either an SPF failure or a DKIM failure will cause a DMARC rejection if p=reject. -Jim P. ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org