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Re: [dmarc-ietf] non-mailing list use case for differing header domains

John R Levine <johnl@taugh.com> Tue, 28 July 2020 20:30 UTC

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Date: Tue, 28 Jul 2020 16:30:47 -0400
Message-ID: <655df0e7-4fef-e441-9a57-df4a10aa1fa3@taugh.com>
From: John R Levine <johnl@taugh.com>
To: Todd Herr <todd.herr@valimail.com>
Cc: IETF DMARC WG <dmarc@ietf.org>
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References: <BY5PR13MB29998094418C8A6C25902569D7730@BY5PR13MB2999.namprd13.prod.outlook.com> <20200728173716.068CB1D9840C@ary.qy> <CAHej_8na3MLm1i4AZzgbL=7EZ7QBX8OvSB4BOqHg-1osBc4H_w@mail.gmail.com>
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Subject: Re: [dmarc-ietf] non-mailing list use case for differing header domains
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On Tue, 28 Jul 2020, Todd Herr wrote:
> Using the Sender header and the "snd" bits in the DMARC policy for
> firstbrand.com, DMARC would pass for the Sender domain and fail for the
> From domain.
>
> Which verdict gets applied to the message?

I believe the reasoanble answer is both, and the filtering engine 
evaluates both based on their reputations.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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