Re: Last Call: <draft-ietf-dmarc-interoperability-15.txt> (Interoperability Issues Between DMARC and Indirect Email Flows) to Informational RFC

Brian E Carpenter <brian.e.carpenter@gmail.com> Sat, 21 May 2016 23:23 UTC

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Subject: Re: Last Call: <draft-ietf-dmarc-interoperability-15.txt> (Interoperability Issues Between DMARC and Indirect Email Flows) to Informational RFC
To: ietf@ietf.org
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Sun, 22 May 2016 11:08:47 +1200
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Cc: alexey.melnikov@isode.com, dmarc@ietf.org, draft-ietf-dmarc-interoperability@ietf.org, Ned Freed <ned.freed@mrochek.com>, dmarc-chairs@ietf.org
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This is useful.

> 4.1.3.3.  Mailing Lists
> 
>    [RFC6377] provides some guidance on using DKIM with Mailing lists.
>    The following mitigation techniques can be used to ease
>    interoperability issues with DMARC and Mailing lists:

It should probably be indicated whether these techniques would be applied
to all messages, or only to messages sent from domains with a DMARC
policy other than "p=none". (I prefer the latter.)
...
>    o  Configuring the MLM to "wrap" the message in a MIME message/rfc822
>       part and to send as the Mailing List email address.  Many email
>       clients (as of the publication of this document), especially
>       mobile clients, have difficulty reading such messages and this is
>       not expected to change soon.

This seems like a quite elegant solution. I'm very surprised by the second
sentence - are these clients that have difficulty with many Content-Types
or is it a specific issue for message/rfc822?

Thanks
   Brian