Re: Encoding issue in the digest (Re: Emacs-devel Digest, Vol 240, Issue 25)

[Kazuhiro Ito]

> >> I'm using Apple's Mail.app. I don't usually have issues displaying
> >> contents in French/Japanese, etc. even mixed with other languages.
> > 
> > Maybe something is wrong here, then.  I'm not an expert on this stuff;
> > does anyone know whether this Subject encoding is OK or not?

Obviously not.
I read your original message from newsgroup via Wanderlust.  Your
message's subject is below.

--------
Subject: =?utf-8?Q?Traduction_fran=C3=A7aise_des_manuels_d=E2=80=99Emacs,
 _=C3=A9tat_des_lieux.?=
--------

SPACE and LF within encoded-word are not allowed.
RFC 2047 (in section 2) says

> IMPORTANT: 'encoded-word's are designed to be recognized as 'atom's
> by an RFC 822 parser.  As a consequence, unencoded white space
> characters (such as SPACE and HTAB) are FORBIDDEN within an
> 'encoded-word'.  For example, the character sequence
>
>    =?iso-8859-1?q?this is some text?=
>
> would be parsed as four 'atom's, rather than as a single 'atom' (by
> an RFC 822 parser) or 'encoded-word' (by a parser which understands
> 'encoded-words').  The correct way to encode the string "this is some
> text" is to encode the SPACE characters as well, e.g.
>
>    =?iso-8859-1?q?this=20is=20some=20text?=

-- 
Kazuhiro Ito