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[dmarc-ietf] Re: Discussion Thread for Issue 155

John R Levine <johnl@taugh.com> Fri, 25 October 2024 17:14 UTC

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Date: Fri, 25 Oct 2024 13:14:15 -0400
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From: John R Levine <johnl@taugh.com>
To: Alessandro Vesely <vesely@tana.it>, dmarc@ietf.org
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Subject: [dmarc-ietf] Re: Discussion Thread for Issue 155
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> On Fri 25/Oct/2024 17:51:47 +0200 John R Levine wrote:
>>> That way a receiver has to manage a list of forwarding recipes for each 
>>> user.
>> 
>> Surely it is obvious why this sort of thing does not scale.
>
> Beg your pardon, but it's not obvious to me.  It should be a small number, 
> I'd guess less than a few hundreds, less than 10 on average.  If older spam 
> filters could manage it, why wouldn't it scale for an ARC filter?

Some mail systems have a billion users, most of whom are not technically 
sophisticated, and too many of whom are spammers trying to trick the 
reputation system.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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