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Re: [Bimi] Bimi Goals (was: Re: Thoughts about MUA/BIMI)

"Brotman, Alex" <Alex_Brotman@comcast.com> Fri, 12 August 2022 16:37 UTC

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From: "Brotman, Alex" <Alex_Brotman@comcast.com>
To: "BIMI (IETF) (bimi@ietf.org)" <bimi@ietf.org>
Thread-Topic: Bimi Goals (was: Re: [Bimi] Thoughts about MUA/BIMI)
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Date: Fri, 12 Aug 2022 16:37:18 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bimi/I5K0lQX-zcLI5MAgceZI8EWFXWc>
Subject: Re: [Bimi] Bimi Goals (was: Re: Thoughts about MUA/BIMI)
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BIMI, as currently designed, does not function without DMARC.  When a domain adopts BIMI (and by requirements, publishes a DMARC of q/r for the OrgDom), every MBP who utilizes DMARC on inbound messaging receives the benefit of that domain having moved to an enforcing policy.  That happens regardless of whether that MBP utilizes BIMI for their users.  To me, that seems fairly important.  The order as stated below is irrelevant (and they weren’t meant to be ordered by importance).

--
Alex Brotman
Sr. Engineer, Anti-Abuse & Messaging Policy
Comcast

From: Dave Crocker <dhc@dcrocker.net>
Sent: Friday, August 12, 2022 11:22 AM
To: Brotman, Alex <Alex_Brotman@comcast.com>; BIMI (IETF) (bimi@ietf.org) <bimi@ietf.org>
Subject: Bimi Goals (was: Re: [Bimi] Thoughts about MUA/BIMI)

On 8/11/2022 7:21 AM, Brotman, Alex wrote:

Consider we have two primary goals (in short form):

  1.  Drive DMARC adoption
  2.  Associate an image with properly authenticated messages

Alex,

Looking at the Bimi technical details, one sees a mechanism to permit a standardized way of conveying a marketing image from its owner to a recipient, in aid of privileged display.  It is, therefore, simply a mechanism to increase marketing 'impressions'.

That some folk working on Bimi have a hope that its use will produce better adoption of some existing email authentication mechanisms is nice -- albeit, a fragile hope, in the absence of a demonstrated history of such an effort succeeding -- but it is outside of the technical and operational basics of Bimi. Adoption and use of Bimi can be significantly successful, in terms of facilitating marketing impressions, while having no meaningful effect on the global use of email authentication.

At the very least, that means the ranking order you have given is wrong.

But there also seems to be some indication that the fragile goal is being used to justify sub-optimal engineering design and to justify rejecting better design.

d/

--

Dave Crocker

Brandenburg InternetWorking

bbiw.net

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