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Re: [dmarc-ietf] DMARC-Compliant Mailing Lists

Dave Crocker <dcrocker@gmail.com> Fri, 08 October 2021 15:58 UTC

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Date: Fri, 08 Oct 2021 08:58:16 -0700
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To: Scott Kitterman <sklist@kitterman.com>, dmarc@ietf.org
References: <163330644504.4498.4372063758638317614@ietfa.amsl.com> <c3cf273d-70df-ad7c-c95a-a0c7bd1afdd5@baptiste-carvello.net> <a590a774-f03b-8b48-e587-12c1f510f63f@tana.it> <1804744.4HeO0Q4e3A@zini-1880>
From: Dave Crocker <dcrocker@gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dmarc/uLUbwNZAt-xUXiMJyjIVju4SBcs>
Subject: Re: [dmarc-ietf] DMARC-Compliant Mailing Lists
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On 10/8/2021 8:41 AM, Scott Kitterman wrote:
> It's not clear to me which you mean by author's domain?  Are you suggesting
> that the email originator include both Author and From and DKIM sign Author
> instead of From?

Yes he is.  Please see:

    Email Author Header Field

    https://datatracker.ietf.org/doc/rfc9057/

>     Abstract
>
>         Internet mail defines the From: header field to indicate the author
>         of the message's content and the Sender: field to indicate who
>         initially handled the message on the author's behalf.  The Sender:
>         field is optional if it has the same information as the From: field.
>         This was not a problem until development of stringent protections on
>         use of the From: field.  It has prompted Mediators, such as mailing
>         lists, to modify the From: field to circumvent mail rejection caused
>         by those protections.  In effect, the From: field has become
>         dominated by its role as a handling identifier.
>
>         The current specification augments the altered use of the From: field
>         by specifying the Author: field, which ensures identification of the
>         original author of the message and is not subject to modification by
>         Mediators.  This document is published as an Experimental RFC to
>         assess community interest, functional efficacy, and technical
>         adequacy.

d/

-- 
Dave Crocker
dcrocker@gmail.com
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