Re: [dmarc-ietf] ARC vs reject

Michael Thomas <mike@mtcc.com> Mon, 07 December 2020 18:39 UTC

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To: "Murray S. Kucherawy" <superuser@gmail.com>, Dotzero <dotzero@gmail.com>
Cc: IETF DMARC WG <dmarc@ietf.org>
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From: Michael Thomas <mike@mtcc.com>
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Date: Mon, 07 Dec 2020 10:39:29 -0800
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Subject: Re: [dmarc-ietf] ARC vs reject
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On 12/7/20 10:32 AM, Murray S. Kucherawy wrote:
> On Mon, Dec 7, 2020 at 4:05 AM Dotzero <dotzero@gmail.com 
> <mailto:dotzero@gmail.com>> wrote:
>
>     I've asked here and in other places that validators/receivers
>     consuming ARC headers provide data regarding the results of such
>     consumption. To date we have not seen any data provided by
>     participants in the ARC experiment. It may be that ARC is a useful
>     standard or it may not be. So far I'm seeing a lot of supposition
>     and speculation but no useful data for evaluation.
>
>
> I wonder if we might ask our compatriots at M3AAWG if they might be 
> willing or able to undertake a data collection project in this area.  
> Most of the ARC proponents are also participants there.
>
What I'm particularly curious about is what the difference is with the 
arc auth-res on the filtering decisions. Why would a decision turn on 
that result? That's something I've been trying to understand, but 
haven't managed to get. Naively it seems like it could be useful, but is 
it in reality? Like can somebody show some A-B kind of examples, and 
whether or not they are statistical noise?

Mike