rolf,
> This is an interesting observation. Do you mean Yahoo groups suffer
> from the DMARC p=reject policy of AOL ...
Yes. Yahoo Groups suffer from any sending group member's email service
having a p=reject setting when combined with the direct implementation
of that policy by a receiving group member's email service.
So for example a member sending from an aol.com address causes a member
receiving at a comcast.com address to have a "bounce" recorded against
the receiving member's email address.
The effect on the particular group is that message delivery is noticed
by some members to have become much less reliable. And depending on the
nature of the group that can be very disruptive. The case that has
gained the most notice is that a sending member with an aol.com address
doesn't receive their own message back from the group. List members tend
to notice not getting their own messages back (particularly when they
reliably had, up through a certain date).
One might expect the same to apply to members sending from yahoo.com, as
Yahoo Mail also has set p=reject. However, the envelope-From of a
message passed through Yahoo Groups is (relaxed) aligned with yahoo.com,
and Yahoo "naturally" included Groups' outbound servers in the SPF
records for yahoo.com. So that particular case passes DMARC for all
receivers.
> ...and AOL groups suffer from the DMARC p=reject policy of Yahoo!?
I don't know anything about "AOL groups", if such exist.
> If so, members of the DMARC initiative create problems for one
> another, which might help to get more attention for this problem from
> the TBTI ESP's.
Maybe.
At the moment testing indicates that Yahoo Mail itself has joined with
Gmail in not taking the the p=reject as the only factor in determining
the disposition of an inbound message. That is, members with yahoo.com
addresses report receiving messages from members with aol.com addresses,
albeit sometimes or maybe "often" in the Spam folder.
I don't know if Yahoo Mail is treating messages via other lists
similarly, or if they are applying a special case for Yahoo Groups.
-- Shal
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