[Mailman-Developers] Adding DMARC support for Mailman 3

[Stephen J. Turnbull]

Franck Martin writes:

 > We are not asking mailman to do the work of DMARC here. There is
 > openDMARC for that.

Of course you are, in feature #1.  Unless you take it literally
(reject all email that comes from such a domain, *including* email
that would authenticate correctly in a full DMARC implementation).

I think that the appropriate interpretation of that feature request is
that "in some cases, Mailman needs to play the role of MTA in the
DMARC protocol."  Anything less than a full implementation is a denial
of service and screws everybody: the domain owners, the recipients,
and the Mailman site admins, list admins, and moderators.  And us, who
will take the lion's share of PRs for it even if it's a third-party
module.

Steve