Re: Will mailing lists survive DMARC?

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On 4/29/2014 6:03 AM, Mikael Abrahamsson wrote:
I quickly went through
https://datatracker.ietf.org/doc/draft-kucherawy-dmarc-base/?include_text=1
which I guess is the draft we're discussing? As far as I can tell, it
doesn't "inform" about the problem DMARC causes in conjunction with
quite prevalent mailing list functionality.


Well, it does, but not in the most pedagogical fashion one might wish for. "Obscure" wouldn't be an inappropriate characterization...

   Appendix C.  DMARC XML Schema
   ...
   Descriptions of the PolicyOverrideTypes:
   ...
   mailing_list:  Local heuristics determined that the message arrived
      via a mailing list, and thus authentication of the original
      message was not expected to succeed.

The draft BCP is another opportunity to clarify such issues, and already has some text:

     http://tools.ietf.org/html/draft-crocker-dmarc-bcp-03

     11. DMARC Commentary -- What were they thinking of...?
     ...
     Why doesn't DMARC solve its problem with mailing lists/gatewats?

d/


--
Dave Crocker
Brandenburg InternetWorking
bbiw.net





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