On Thu, Mar 30, 2023 at 8:56 AM Barry Leiba <barryle...@computer.org> wrote:

> 2. Without the workaround, the real pain is not that a message from
> Comcast posted to the list doesn't get to you (though that's true): the
> real pain is that if Valimail rejects (bounces) those messages, the Mailman
> software will eventually unsubscribe you -- YOU, not the Comcast user --
> from the list for exceeding the bounce threshold.
>

This is laid out in RFC 6377, Section 5.2, if it would be helpful to have
something published to reference.  Indeed, ADSP threatened the same damage
that DMARC "p=reject" causes, which I think was one of the reasons it never
got adopted.

-MSK, participatorially
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