Reporting allows certainty within the limits of the reporting mechanism.
My inference is that many domains stop at p=none for an extended period or
forever because the reporting mechanism does not provide that certainty.
 For my part, I backed away from reject when I received fail-with-reject
reports from Outlook.com.  These proved to be false results (messages were
not blocked) but the fear remained.  Since then, domain members have
started participating with mailing lists, and I have not determined how the
list handles p=reject participation.  So I am back at none.

More importantly, the SPF neutral gimmick can be applied immediately, with
confidence that it will be handled as intended by essentially all
evaluators.

By contrast, the new tag cannot be effective until DMARCbis is published
and filtering software updated.  This involves years.  Even then, domain
owners will never have confidence that the new token support has been
implemented by all recipient evaluators.

Additionally, we have testimony that the neutral gimmick has been recently
used on a large scale, to block SPf upgrade attacks, with good results.

Seems like a slam dunk for SPF neutral.  I said the problem and it's
solution needs to be laid out in our document because I am one of those who
did not understand it as a possible strategy

Doug

On Sun, Oct 29, 2023, 2:03 PM Richard Clayton <[email protected]>
wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> In message <CAH48ZfyvA5F8vqUQqyUujKqZHyLKK-fpDm0C3abwet=Zq-
> [email protected]>, Douglas Foster <[email protected]
> m> writes
>
> >    * auth=DKIMOnly requires that the domain owner have high confidence
> >      that every message source is applying DKIM signatures.
>
> which of course the reporting mechanism allows them to acquire
>
> - --
> 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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>
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