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Re: [dmarc-ietf] ARC vs reject

Michael Thomas <mike@mtcc.com> Sat, 05 December 2020 22:07 UTC

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To: John Levine <johnl@taugh.com>, dmarc@ietf.org
References: <20201205220233.18DCA2904B56@ary.qy>
From: Michael Thomas <mike@mtcc.com>
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Date: Sat, 05 Dec 2020 14:07:12 -0800
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Subject: Re: [dmarc-ietf] ARC vs reject
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On 12/5/20 2:02 PM, John Levine wrote:
> In article <c7187eca-89d2-77a7-4bd9-183eb65b7a43@mtcc.com> you write:
>>> our job to try to guess whether the bank's users are following some
>>> internal policy we can't see.
>> There is no guarantee of that. If my bank says reject that mail, I want
>> my provider to reject that mail, period. No amount of ARC shenanigans
>> should change that policy.
> OK, ARC doesn't do that. This does not mean that ARC is broken, only
> that you appear to have different policy priorities than other people.
> As you know, DMARC has never obliged recipients to follow senders'
> policies so this is nothing new.

If ARC is advocating for a bypass of p=reject that introduces a new 
state. If my policy is reject, I want you to reject the mail. If I want 
you to reject the mail unless you think it has come from an acceptable 
place with receipts, then you need a new policy tag like 
reject-except-valid-arc.

Mike

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