[dns-operations] Mailing List Behaviour Change

[Jim Popovitch]

On Sat, 2019-04-06 at 15:07 -0400, John Levine wrote:
> In article <1554071561.15150.1.camel at domainmail.org> you write:
> > Might I suggest that you also wrap messages with a p=none policy.  Per the
> > spec, p=none is for testing, but  that doesn't mean "do nothing".  Wrap the
> > p=none messages so that those senders too will see how DMARC impacts them.
> 
> I think you're confusing p=none with pct=0.  The former most
> definitely means to do nothing.

7489 says that "p=none" receivers are to do nothing with regard to delivery
(reception), but it ends there, imho.  Mailman (and other MLMs) handle p=none
during refection and can serve a valuable purpose by showing the affects of
DMARC on the sender's domain.

-Jim P.