If it's a good idea to have a registry of DNS names with special meanings, I'd rather see one RFC that establishes and populates a registry of them, perhaps as an update to RFC 2606. Such a registry might also usefully include names that have special meanings within DNS names such as _<service> from 2782 and _domainkey from 4871. At this point I'm agnostic about the utility of adding SINK.ARPA to such a registry, since I don't know how much in practice the "helpful" rewriting of NXDOMAIN by some caches would interfere with its use. R's, John _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf