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From: Simon Josefsson <jas@extundo.com>
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Subject: Re: Bug in mail-extract-address-components (mail-extr.el)?
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Reiner Steib <4uce.02.r.steib@gmx.net> writes:

> Recently I noticed, that the function fails for the following From:
> line (which seem to be correct according to RFC-822):
>
> | From: "Harald H.-J. Bongartz" <bongie@gmx.net>
>
> Instead of "Harald H.-J. Bongartz" I get "Harald H.":

Yes, mail-extr.el does (too) many things.  The code that fails in this
example is:

	 ;; Fixup initials
	 ((looking-at mail-extr-initial-pattern)
	  (or (eq (following-char) (upcase (following-char)))
	      (setq lower-case-flag t))
	  (forward-char 1)
	  (if (eq ?. (following-char))
	      (forward-char 1)
	    (insert ?.))
	  (or (eq ?\  (following-char))
	      (insert ?\ ))
	  (setq word-found-flag t))

> Is this a bug in `mail-extract-address-components' or should I use a
> different function to get the full name?

mail-extr is not a clean RFC 2822 parser, it is a heuristic parser.
There is no complete RFC 2822 parser in Emacs AFAIK, only several
heuristic ones.

A real RFC 2822 parser would be good to have, it would improve Gnus'
header encoding which sometimes generate bad QP that causes mail to be
bounced...