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From: Simon Josefsson <jas@extundo.com>
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Subject: Re: bad rfc2047 encoding
Date: Thu, 22 Aug 2002 19:48:52 +0200
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Dave Love <d.love@dl.ac.uk> writes:

> Simon Josefsson <jas@extundo.com> writes:
>
>> "To: \"=?iso-8859-1?q?Gro=DFjohann?=, K (Kai)\"
>>   <Kai.Grossjohann@CS.Uni-Dortmund.DE>
>>  "
>
> Well, that's invalid too.

Ouch, bad.

>> This is with EMACS_21_1_RC.
>
> I was using your patch (in a non-vanilla 21.2).  It looks as though
> some of the insufficiently-tested changes I made for Emacs 22 were
> responsible for the differences, sorry.  I think that just indicates
> in another way that rfc2047.el doesn't DTRT.  I guess the use of Emacs
> charsets saves it from going badly wrong in this case by chance, but
> it's not generally right.  It's coding systems which are
> (more-or-less) equivalent to MIME charsets and need to be checked, not
> Emacs charsets.

Yes.  It would be nice to have it do the right thing, but it seem to
require at least a fairly working rfc 2822 parser/decoder.  Lots of
work, I think.  Anyone want to work on it?