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To: John C Klensin <klensin@mci.net>
Cc: Pete Resnick <presnick@qualcomm.com>, drums@cs.utk.edu
Subject: Re: folding inside quoted local parts 
In-Reply-To: John C Klensin's message of "Fri, 17 Apr 1998 12:34:52 -0400."
References: <SIMEON.9804171252.X@p6.mci.net> 
Date: Sat, 18 Apr 1998 03:11:11 +1000
Message-Id: <26038.892833071@munnari.OZ.AU>
From: Robert Elz <kre@munnari.OZ.AU>

    Date:        Fri, 17 Apr 1998 12:34:52 -0400 (Eastern Daylight Time)
    From:        John C Klensin <klensin@mci.net>
    Message-ID:  <SIMEON.9804171252.X@p6.mci.net>

  | So, excusing the "real" BNF, a continuation line is
  | 
  | <sp><lwsp-x><text>
  | 
  | where <lwsp-x> is reducable leading white space if not part of a 
  | quoted string, and part of the quoted string otherwise.  

No, it is never reducable - the preceding CRLF is deleted, and the rest
of it is left alone, always.   In a structured field body all that extra
white space will be irrelevant, but it is still there.

  | I wonder how many existing implementations know that?  :-)

I wonder how many correctly handle folding in quoted strings at all...

  | interesting issues about how one might construe
  |   To:<sp>"Joe<crlf><sp><sp><sp><bs><ht><sp>Bloggs"@...

Simple, as...

  |   To:<sp>"Joe<sp><sp><sp><bs><ht><sp>Bloggs"@...

Whatever that local part means to the desination mailer.   "User unknown"
would be the most common response I think..

kre