Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!hp4nl!charon!piet From: piet@cwi.nl (Piet Beertema) Newsgroups: comp.mail.sendmail Subject: Re: Sendmail host canonicalization broken? Message-ID: <3331@charon.cwi.nl> Date: 16 Apr 91 11:34:29 GMT References: <12665@pt.cs.cmu.edu> <1991Apr14.002726.9334@mp.cs.niu.edu> Sender: news@cwi.nl Organization: CWI, Amsterdam Lines: 16 >So, in our hypothetical example, the user can send mail to >"user@eiffel.fr" or to "user@eiffel.fr.", and the mail will go to >(822-address) "user@eiffel.fr.mcc.com" or to (822-address) >"user@eiffel.fr", as appropriate. Only "user@eiffel.fr" is appropriate here, as per RFC822, section 6.2.2. Either you allow 2-letter subdomains that - now or in the future - coincide with official top level domains, but then you have no choice other than not allowing abbreviated addresses. Or you don't allow 2-letter subdomains and leave open the option of allowing abbreviated addresses. -- Piet Beertema, CWI, Amsterdam (piet@cwi.nl)