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Article #93can an @domain be numeric?
From: Paul A Vixie
Date: Fri, 21 Aug 1992 17:41
Date: Fri, 21 Aug 1992 17:41
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1072 bytes
rfc822 implies "yes". many IBM/VM/SMTP mailers seem to say "no" in that if they see From: user@10.977.enet.dec.com they yell about the "1" following the "@". we're trying to design an address encapsulation and i'd like to know what rules i ought to follow to cause the least net.strife. is it the case that the first character of a domain can't be numeric? (what about 3com.com?) is it that the first token must not be purely numeric? is it the case that all tokens must not be purely numeric? speculations, suggestions, and flames all welcome.
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arc1-ca.pugleaf.net!sparky!uunet!olivea!hal.com!decwrl!pa.dec.com!vixieShow Full Headers
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!hal.com!decwrl!pa.dec.com!vixie From: vixie@PA.dec.com (Paul A Vixie) Newsgroups: comp.mail.headers Subject: can an @domain be numeric? Message-ID: <9208211741.AA28843@cognition.pa.dec.com> Date: 21 Aug 92 17:41:58 GMT Lines: 14 X-Received: by usenet.pa.dec.com; id AA07226; Fri, 21 Aug 92 10:42:04 -0700 X-Received: by cognition.pa.dec.com; id AA28843; Fri, 21 Aug 92 10:41:59 -0700 X-To: comp.mail.headers.usenet X-Cc: brian@ucsd.edu, fair@apple.com X-Mts: smtp