On Jan 24, 2009, at 6:01 PM, John C Klensin wrote:
--On Sunday, January 25, 2009 12:30 +1100 Mark Andrews
<Mark_Andrews(_at_)isc(_dot_)org> wrote:
Dotless hostnames are in the local namespace and can *never*
be made to work *reliably* in a global context.
Note the use of non-heirachical names is undoing the changes
introduced by RFC 921 and will introduce problems RFC 921
was trying to remove/prevent.
Yeah. Since I have not been able to find a single hint in
ICANN's new TLD plans that those TLDs would be restricted to
delegation-only uses, tell it to ICANN. Or tell it to whomever
is supposed to be supplying adult supervision to ICANN :-(
Not an SMTP problem. SMTP requires FQDNs, without exception,
and does not permit single-component ones.
5321 explicitly says otherwise ("A domain name (or often just a
"domain") consists of one or more components, separated by dots if
more than one appears. In the case of a top-level domain used by
itself in an email address, a single string is used without any dots.").
The whole point of this thread is to dig a little deeper into why that
decision was made and what the implications are, I think.
Cheers,
Steve