To: Mark Crispin <MRC@Panda.COM>
Cc: John Gardiner Myers <jgm+@CMU.EDU>, drums@cs.utk.edu
Subject: Re: Free insertion of linear-white-space 
In-Reply-To: Your message of "Mon, 11 Mar 1996 10:35:21 -0800."
             <MailManager.826569321.18793.mrc@Ikkoku-Kan.Panda.COM> 
Date: Tue, 12 Mar 1996 06:29:00 +1100
Message-Id: <23978.826572540@munnari.OZ.AU>
From: Robert Elz <kre@munnari.oz.au>

    Date:        Mon, 11 Mar 1996 10:35:21 -0800 (PST)
    From:        Mark Crispin <MRC@Panda.COM>
    Message-ID:  <MailManager.826569321.18793.mrc@Ikkoku-Kan.Panda.COM>


    It does not matter that 822bis permits
    blurdybloop@]sara[.soop.
    or not.  Separate rules for DNS syntax ...

Be careful here, make sure you understand just where your rules
are coming from.

The DNS itself has *no* rules on what is a legal name (other than
that it be < 256 bytes, with none of the parts between the
dots being longer than 63 bytes - and definitely "bytes", or
octets if you prefer, there, not characters).

All rules must come from elsewhere - that could be the hostname
rules (rfc952) which really is obsolete now, or from 822, or
someplace else (section 2.1 of rfc1123 perhaps).

Please be sure that the rules you want to apply actually exist
somewhere before deleting them from 822.   Note that 1123 says
(if interpreted the way it seems to be written) that user@10.1.2.3
SHOULD be acceptable - where we all know that it isn't, and we
most certainly don't want it to be.

In any case, deleting . (at least) from specials was rejected,
not because of what it mighth permit in the domain, but because
of what it would permit in the local part (where there are
certainly no other rules that can apply).

kre