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

[Alessandro Vesely <[e-mail]>]

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
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