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Re: [dmarc-ietf] DMARC2 & SPF Dependency Removal

Richard Clayton <richard@highwayman.com> Sun, 11 June 2023 04:43 UTC

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Date: Sun, 11 Jun 2023 02:07:35 +0100
To: dmarc@ietf.org
From: Richard Clayton <richard@highwayman.com>
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Subject: Re: [dmarc-ietf] DMARC2 & SPF Dependency Removal
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In message <7f854d28-d3b5-fd00-4613-b8baa1217bd7@tana.it>, Alessandro
Vesely <vesely@tana.it> writes

>What I find nonsensical is to eliminate SPF in order to save DNS queries,

at $DAYJOB$ (a large mailbox provider) SPF queries are limited to 15 ...
since the prescribed limit of 10 was determined to cause too many SPF
passes not to be found...

> given 
>that we replaced local PSL lookups with a series of queries.  We cannot do that 
>and pretend that SPF is too expensive.

the change here is not, I believe, 15 ... or even 10  (I think, counting
quickly on my fingers, it's +3 -- and for the vast majority of cases +0)

- -- 
richard                                                   Richard Clayton

Those who would give up essential Liberty, to purchase a little temporary 
Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755

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