Re: [dmarc-ietf] Proposed text for p=reject and indirect mail flows

[Douglas Foster <[e-mail]>]

Thank you for returning to the topic of stream identifiers.   Email
filtering is not about single messages, it is about identifying and
classifying streams into high value (whitelist), low value (allow) and
unwanted (block).

I know existing filtering configurations that will conditionally block list
messages, without DMARC, because of a distrusted From value.   So I do not
believe every thing would be hunky-fory if DMAzrC could only go away.

My Stream-Info header idea could add a lot of value to the ML problem

Doug

On Wed, Apr 12, 2023, 5:47 AM Alessandro Vesely <[e-mail]> wrote:

> On Sat 08/Apr/2023 23:27:26 +0200 Douglas Foster wrote:
> > Even when the recipient and the evaluator have a great working
> relationship,
> > neither party may understand what exceptions are needed for the messages
> from
> > every participant, current or future, to be accepted reliably.   So the
> list
> > messages arrive smoothly until a message is sent from a participant in a
> > geo-blocked country.    The user discovers the problem when he realizes
> that he
> > has no idea what topic is being discussed, because he missed the initial
> post.
>
>
> That seems to be an old-fashioned non-rewrite case.
>
>
> > It seems evident that to get consistent evaluation results, evaluators
> need to
> > judge based on the list identity and reputation, rather than the sender
> > identity and reputation.   I do not see how this can be achieved without
> > replacing the From address with an address in the list domain.
> Replacing the
> >  From address is not the only obstacle, but it is the starting point.
>
>
> An alternative to matching From: could be to match stream identifiers.
> Someone
> tells the recipient's MX that she subscribed to stream XYZ, so please
> accept
> such posts.  I'd guess a list has to be "DMARC-clean" for MXes to agree.
>
>
> Best
> Ale
> --
>
>
>
>
>
>
> _______________________________________________
> dmarc mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/dmarc
>