> > > >What does this do to automated relay system? Most use a subscription method. Messages from unsubscribed senders would not be permited. A CR system should not subscribe and if we used a convention for the CR sender, then that could easily be filtered as well. _______________________________________________ Asrg mailing list Asrg@ietf.org https://www1.ietf.org/mailman/listinfo/asrg