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Re: domain name definition in RFC2821

2006-04-22 00:33:06


On Sat, 22 Apr 2006, william(at)elan.net wrote:

Can you give an example of a "single-component domain name" that would *not*
be flagged as a failure to canonalize to a FQDN?

Are there any e-mail addresses that *work* (or even could *potentially* work)
of the form 'userid(_at_)com' or 'userid(_at_)net' or 
'some(_dot_)full(_dot_)name(_at_)to' or anything
else like that?

postmaster(_at_)ws ?

$dig mx ws
 <<>> DiG 9.3.1 <<>> mx ws
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49855
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 6
;; QUESTION SECTION:
;ws.                            IN      MX
;; ANSWER SECTION:
ws.                     21600   IN      MX      10 mail.worldsite.ws.

$ telnet mail.worldsite.ws 25
Trying 216.35.187.251...
Connected to mail.worldsite.ws (216.35.187.251).
Escape character is '^]'.
220 ****0**************************************************22*****200**00********0*00
HELO elan.net
250 mail01.worldsite.ws Hello [216.151.195.99], pleased to meet you
MAIL FROM:<>
250 2.1.0 <>... Sender ok
RCPT TO:postmaster(_at_)ws
250 2.1.5 postmaster(_at_)ws(_dot_)(_dot_)(_dot_) Recipient ok

--
William Leibzon
Elan Networks
william(_at_)elan(_dot_)net