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Re: [dmarc-ietf] ARC Multi Proposal

"Kurt Andersen (b)" <kboth@drkurt.com> Fri, 02 November 2018 09:13 UTC

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References: <9957335.dUWMaE32Bo@kitterma-e6430> <20181101235621.AF0B52007DFEBA@ary.local> <CABuGu1qOstiqvHfPSnZmfgHXx-VEAq543g9GWjWGaDQ3GxFUgw@mail.gmail.com> <alpine.OSX.2.21.1811021550560.13429@ary.local> <CABuGu1pCusR+L+QMBbOrODFRyaNbC+JBhHoSd46gGtB95nv_nA@mail.gmail.com> <alpine.OSX.2.21.1811021607520.13429@ary.local>
In-Reply-To: <alpine.OSX.2.21.1811021607520.13429@ary.local>
From: "Kurt Andersen (b)" <kboth@drkurt.com>
Date: Fri, 02 Nov 2018 05:13:21 -0400
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To: John Levine <johnl@taugh.com>
Cc: dmarc@ietf.org, Scott Kitterman <sklist@kitterman.com>
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Subject: Re: [dmarc-ietf] ARC Multi Proposal
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On Fri, Nov 2, 2018, 18:09 John R Levine <johnl@taugh.com wrote:

> On Fri, 2 Nov 2018, Kurt Andersen (b) wrote:
> >> I mean ARC as it's implemented now, not in our multi-signing draft.
> > It seems like a poor implementation choice to be enforcing something
> which
> > is not part of the spec :-), especially when there are parenthetical
> > comments and references to things like ARC-MULTI to warn you against
> > leaping to foot-shooting enforcement choices.
>
> I see it also says:
>
>     Valid ARC Sets MUST have exactly one instance of each ARC header
>     field (AAR, AMS, and AS) for a given instance value and signing
>     algorithm.
>
> I'm reasonably sure that doesn't match a lot of running code.  I'm
> particularly thinking of gmail here.
>

That should be easy to test but not with a tiny keyboard as I board my
flight from ICN --> BKK.

--Kurt

>

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