John C Klensin wrote: > I don't believe that I seen any evidence of anyone who > had a strong position changing his or her mind since > the discussion started, nor have I seen a new argument > presented after the first few days. The argument from somebody saying that his "by name" API hides IPv4 vs. IPv6 details as it should, and that adding some logic to distinguish the results would be annoying, impressed me. 2821bis cannot say MUST NOT for AAAA, but it could still limit any "implicit MX" MUSTard to IPv4. Frank _______________________________________________ IETF mailing list IETF@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf