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Re: [dmarc-ietf] Signaling MLMs

"Murray S. Kucherawy" <superuser@gmail.com> Sat, 15 April 2023 00:17 UTC

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From: "Murray S. Kucherawy" <superuser@gmail.com>
Date: Fri, 14 Apr 2023 17:17:28 -0700
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To: Douglas Foster <dougfoster.emailstandards@gmail.com>
Cc: Scott Kitterman <sklist@kitterman.com>, IETF DMARC WG <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] Signaling MLMs
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On Fri, Apr 14, 2023, 14:51 Douglas Foster <
dougfoster.emailstandards@gmail.com> wrote:

> Interoperability problems occur because MLMs believe they are exempt from
> the security problems that lesser mortals face.
>

This isn't true. Interoperability problems started when senders posted a
restrictive policy and receivers began enforcing it. The MLMs didn't have a
chance to form such a belief structure before things were already broken.


The Sender or MLM may be unhappy if lost eyes mean lost revenue, but an
> evaluator is tasked with disappointing senders, many times per day.
>

The Sender's users being denied the ability to participate in a list due to
its policies seems to me like it puts this customer service problem where
it belongs.

Document the issue as a customer service problem and I am on board.
>

Indeed.

-MSK, participating

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