In message <A59BA6D46DAC12C2B7CF072D(_at_)PST(_dot_)JCK(_dot_)COM>, John C
--On Sunday, January 25, 2009 12:30 +1100 Mark Andrews
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.
But it is a problem for SUBMIT.
4.2. Ensure All Domains are Fully-Qualified
The MSA MUST ensure that all domains in the envelope are fully-
If the MSA examines or alters the message text in way, except to add
trace header fields [SMTP-MTA], it MUST ensure that all domains in
address header fields are fully-qualified.
Reply code 554 is to be used to reject a MAIL FROM, RCPT TO, or DATA
command which contains improper domain references.
NOTE: A frequent local convention is to accept single-level domains
(for example, 'sales') and then to expand the reference by adding the
remaining portion of the domain name (for example, to
Gellens & Klensin Standards Track [Page 6]
RFC 2476 Message Submission December 1998
'sales.example.net'). Local conventions that permit single-level
domains SHOULD reject, rather than expand, incomplete multi-level
domains, since such expansion is particularly risky.
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews(_at_)isc(_dot_)org