[Mailman-Users] Emails from yahoo members, are getting rejected by yahoo, "Service Unavailable".

[Jim Popovitch]

On Mon, Apr 14, 2014 at 2:33 PM, Joe Sniderman
<joseph.sniderman at thoroquel.org> wrote:
> On 04/13/2014 06:03 PM, Jim Popovitch wrote:
>> 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.
>
> Nooooooo...    If either one passes, DMARC passes.
>
>>> 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.
>
> Even if that were the case, which it is not, SPF should pass - since
> typically the list is the envelope sender.

Yes!  (maybe start reading threads from the bottom up?)   :-)

-Jim P.