Date: 07 Aug 1996 19:09:00 +0200
From: kai@khms.westfalen.de (Kai Henningsen)
To: drums@cs.utk.edu
Message-ID: <6EQTUwZEcsB@khms.westfalen.de>
In-Reply-To: <7776.839091009@munnari.OZ.AU>
Subject: Re: smtpupd-02
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kre@munnari.OZ.AU (Robert Elz)  wrote on 04.08.96 in <7776.839091009@munnari.OZ.AU>:

> This is all perfectly fine, as long as we don't assume that the
> DNS imposes any restrictions (other than on lengths).

Well, that depends on what you call "the DNS". The reference  
implementation, which I suspect has something like three quarters of the  
market (but that's only a guess), certainly *does* impose restrictions.

See, for example, comp.protocols.tcpip.domains for discussions of this.  
(Incidentally, the most FAQ seems to be how to configure sendmail to work  
correctly with multiple names per host.)

> If 822bis is to defer to someplace else for domain name rules,
> I think we're going to need to find the somewhere to do that,
> or create it.   I don't think it is reasonable to say that
> "some other RFC which may never be written will give the rules".

That *is* a problem. I'm not sure the information is available at a  
convenient place right now - which is one reason why I prefer us not  
simply dropping it without at least that footnote.

MfG Kai