Re: DMARC methods in mailman

Alexey Melnikov <alexey.melnikov@isode.com> Wed, 21 December 2016 16:18 UTC

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Subject: Re: DMARC methods in mailman
To: Philip Homburg <pch-ipv6-ietf-3@u-1.phicoh.com>, ietf@ietf.org
References: <m1cJIF7-0000DEC@stereo.hq.phicoh.net> <6.2.5.6.2.20161221001758.0bde4ac0@elandnews.com> <m1cJfj3-0000CNC@stereo.hq.phicoh.net> <6.2.5.6.2.20161221065735.0a92e2a0@elandnews.com> <m1cJjSV-0000HJC@stereo.hq.phicoh.net>
From: Alexey Melnikov <alexey.melnikov@isode.com>
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Date: Wed, 21 Dec 2016 16:18:22 +0000
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Cc: S Moonesamy <sm+ietf@elandsys.com>
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On 21/12/2016 16:09, Philip Homburg wrote:

>> At 04:10 21-12-2016, Philip Homburg wrote:
  (snip)
>>> Or are you saying that at the moment 40% of the subscribers of IETF
>>> lists reject
>>> or otherwise not receive mail from DMARC protected senders?
>> The 40% was statistics about one IETF mailing list only.  Messages
>> from the mailing list to those (40%) subscribers would not be
>> rejected as some of the mail providers are not advertising a
>> "p=reject".  A number of the mail providers in that 40% will not
>> deliver messages from the mailing list to the subscribers as they are
>> advertising a "p=quarantine".
> So is that one mailing list typical, or just a bunch of people who like to
> reject mail?
>
> But apart from that, you are saying that for at least that one list, if
> you send a mail to the list with a 'p=reject' then 40% of the subscribers are
> not going to see that message.
This is not correct, SM said that 40% of subscribers publish DMARC 
policy. See my other email on specific numbers.