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Re: [dmarc-ietf] ARC questions

"Douglas E. Foster" <fosterd@bayviewphysicians.com> Sun, 22 November 2020 20:35 UTC

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From: "Douglas E. Foster" <fosterd@bayviewphysicians.com>
To: dmarc@ietf.org
Date: Sun, 22 Nov 2020 15:34:49 -0500
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Subject: Re: [dmarc-ietf] ARC questions
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Apologies.    Either I read an obsolete version of the document, an unrelated document, or have a hallucinating memory.   Hoping it is not my mind going south...

Doug

----------------------------------------

From: "John Levine" <johnl@taugh.com>
Sent: 11/22/20 3:01 PM
To: dmarc@ietf.org
Cc: mike@mtcc.com
Subject: Re: [dmarc-ietf] ARC questions

In article <bb13f0db-362b-78dd-c005-279ac1776672@mtcc.com> you write:
>-=-=-=-=-=-
>
>
>On 11/22/20 11:18 AM, Douglas E. Foster wrote:
>> ARC has a very limited set of items included in the signature.? ?Body
>> hash is purposefully excluded.? So it is the same signature algorithm
>> but with different parameters and a different purpose.? Therefore it
>> has a different header label .
>
>Now wait, Kurt just said that the body hash is included. Somebody has to
>be wrong here.

Doug is mistaken. The ARC-Message-Signature (AMS) header has the same
body hash as a DKIM signature.

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