Doug, are you suggesting we relitigate consensus on this matter? That is a
high bar we do not wish to undertake lightly.

Seth, as Chair

On Fri, Oct 6, 2023 at 19:49 Douglas Foster <
[email protected]> wrote:

> I have only recently implemented all of the tools needed to be able to
> test PSL vs Tree Walk.
>
> I looked at messages which had passed reputation filtering and content
> filtering, to isolate messages where DMARC alone could be determinative.
>  Within that group, 75% of the messages did not need tree walk, either
> because of strict alignment or no alignment.
>
> For the subset where relaxed alignment would be applicable, about  11% had
> no policy, and 1.6% had false failures because the domain owner had
> published strict alignment.
>
> For the subset where relaxed alignment was both specified and applicable,
> the Tree Walk caused about 2% to switch from PASS to FAIL because the
> domains being compared were incorrectly viewed as different organizations.
>
> Is this consistent with the previous research into this issue?
>
> Doug Foster
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>
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