[Mailman-Users] Emails from yahoo members, are getting rejected by yahoo, "Service Unavailable".
jimpop at gmail.com
Mon Apr 14 00:03:59 CEST 2014
On Sun, Apr 13, 2014 at 4:54 PM, Joseph Brennan <brennan at columbia.edu> wrote:
> Jim Popovitch <jimpop at 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
Either an SPF failure or a DKIM failure will cause a DMARC rejection
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