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Re: [dmarc-ietf] Call for Adoption: DMARC Use of the RFC5322.Sender Header Field

"Murray S. Kucherawy" <superuser@gmail.com> Sat, 15 August 2020 16:49 UTC

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From: "Murray S. Kucherawy" <superuser@gmail.com>
Date: Sat, 15 Aug 2020 09:49:27 -0700
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To: Alessandro Vesely <vesely@tana.it>
Cc: IETF DMARC WG <dmarc@ietf.org>, John Levine <johnl@taugh.com>, Dotzero <dotzero@gmail.com>
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Subject: Re: [dmarc-ietf] Call for Adoption: DMARC Use of the RFC5322.Sender Header Field
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On Sat, Aug 15, 2020 at 3:32 AM Alessandro Vesely <vesely@tana.it> wrote:

> The workarounds we have on the table, to standardize From: rewriting
> possibly copying the original From: value to some other field
> (Author:, To:, Reply-To:), to verify DKIM modulo transformations, and
> to accept a tunable set of Sender:'s do have the potential to smooth
> enough harshness and thereby avoid that cans which invalidate
> themselves mess up the store and ruin nearby products, don't they?
>

They are all worthy of consideration, to be sure.  But that's not the thing
to which I was objecting.

The premise that MLMs have actually been long-tolerated abusers is a flawed
one, in my opinion.  I actually used to think the same thing back in the
RFC 4871 era, but I no longer agree.

-MSK

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