Re: DMARC and yahoo

Randy Bush <randy@psg.com> Wed, 16 April 2014 11:52 UTC

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Date: Wed, 16 Apr 2014 20:51:46 +0900
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From: Randy Bush <randy@psg.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Subject: Re: DMARC and yahoo
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References: <CAKW6Ri6OUmxGaBOGR2hoWpDOGWsVQ9tQ2Q9ogkT5wzFhFJLBbQ@mail.gmail.com> <534D9C2C.8010606@gmail.com> <20140415214348.GL4456@thunk.org> <1397607352.389753533@f361.i.mail.ru> <534DCFFB.4080102@gmail.com> <20140416012205.GC12078@thunk.org> <24986.1397615002@sandelman.ca> <534E57BC.1060501@cs.tcd.ie>
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> Maybe people who've done that might want to consider whether its
> such a good plan for so many IETF participants to be dependent on
> just one service now that we have a demonstration that s/none/reject/
> in one TXT RR can have such an impact.

try smtp to goog over ipv6.  if you do not have an spf rr and good
reverse dns, high percentage of rejection.  the excuse is that ipv6
is mostly spam so they put up an aggressive barrier.

randy