> > So, a domain name erroneously appears in an address field and the references > host erroneously accepts mail it shouldn't. > > This degree of problematic operation is not likely to get solved with a new DNS > construct. this specific problem will get solved with a simplification of how email uses DNS. > If someone is sending out invalid email addresses, then that needs to get fixed, > rather than working on some post-hoc mechanism. the two problems are not mutually exclusive. but we can lessen their combined effects. >> Thus, disabling AAAA checking seems to provide much cleaner error >> behavior. > > Reasonable idea. > > Let's do it for all Internet services, not just email. worth considering. but for now only 2821bis is on the table. _______________________________________________ IETF mailing list IETF@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf