[Mailman-Developers] Adding DMARC support for Mailman 3

[Stephen J. Turnbull]

Barry Warsaw writes:
 > On Jul 12, 2013, at 11:56 AM, Stephen J. Turnbull wrote:
 > 
 > > > Yep.  There is some limited ability to do additional checking
 > > > at LMTP time, but this isn't pluggable currently.
 > >
 > >Does LMTP provide the necessary ability to reject?
 > 
 > Not reject in the Mailman sense of sending a bounce message (possibly DSN
 > formatted), but it could refuse to accept the message from the LMTP client.

That's what I meant.  With luck, then, the LMTP rejection could happen
during the MTA's SMTP transaction.