DMARC stats for IETF mailing lists (was DMARC methods in mailman)

Alexey Melnikov <alexey.melnikov@isode.com> Wed, 21 December 2016 16:19 UTC

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Subject: DMARC stats for IETF mailing lists (was DMARC methods in mailman)
To: S Moonesamy <sm+ietf@elandsys.com>, ietf@ietf.org
References: <m1cJIF7-0000DEC@stereo.hq.phicoh.net> <6.2.5.6.2.20161221001758.0bde4ac0@elandnews.com>
From: Alexey Melnikov <alexey.melnikov@isode.com>
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Date: Wed, 21 Dec 2016 16:19:38 +0000
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On 21/12/2016 10:57, S Moonesamy wrote:

> Hi Philip,
> At 03:06 20-12-2016, Philip Homburg wrote:
>
  (snip)
>> People who receive the list on a yahoo account would have to mark the 
>> checkbox
>> (though maybe a list of default domains can be hacked in such that new
>> subscribers for those domain would get it set automatically)
>
> The focus has been on Yahoo because of a message which was posted 
> several years ago.  I collected some statistics for an IETF mailing 
> list.  Approximately 40% of the subscribers are using [1] DMARC; most 
> of then are not using Yahoo.
> Regards,
> S. Moonesamy
>
> 1. This is not the percentage of subscribers using "p=reject".

I ran some scripts on a snapshot of list of subscribers a week ago and 
here is some information:

    Total addresses in the whitelist: 83131
    Number of unique domains:         19668

    Total domains which published any valid DMARC policy: 1398

    Total domains with p=reject DMARC policy: 243
    Total domains with p=quarantine DMARC policy: 167

    Email addresses with p=reject DMARC policy: 4773
    Email addresses with p=quarantine DMARC policy: 1370