> Which brings up a question can a TLD be used like a domain name? > > not just http://microsoft/ but bill.gate@microsoft will likely to fail to. > > james > The Internet went to multi-label hostnames ~20 years ago. We added ".ARPA" to all the single label hostnames as part of that process. The only hold over is "localhost" and that is implemeted locally, not in the global DNS. No sane TLD operator can expect "http://tld"; or "user@tld" to work reliably. I suspect there are still mail configuations around that will re-write "user@tld" to "user@xxxxxxxx". Should we be writting a RFC which states that MX and address records SHOULD NOT be added to the apex of a TLD zone? Should we be writting a RFC which states that single label hostnames/mail domains SHOULD NOT be looked up "as is" in the DNS? Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@xxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf