Re: detecting encoding for Japanese

[Katsumi Yamaoka <yamaoka@jpl.org>]

Well, Gnus sometimes encodes Japanese messages with the headers

  Content-Type: text/plain; charset=euc-jp
  Content-Transfer-Encoding: base64
or
  Content-Type: text/plain; charset=euc-jisx0213
  Content-Transfer-Encoding: base64

if a user run Gnus under Emacs 21.x.  The later case will be
occurred if a user employs the jisx0213 module which is included
in the Mule-UCS package.  Though there are no problems technically
and almost MUAs including Gnus can decode and show such messages
correctly, those encodings are not so common in Japan.
So, I recommend Japanese Gnus users customize the option
`mm-coding-system-priorities' to have popular Japanese charsets
as follows:

(setq mm-coding-system-priorities
      '(iso-2022-jp iso-2022-jp-2 japanese-shift-jis utf-8))

;; Visit http://www.jpl.org/elips/Gnus-Tips-ja.html for more
;; Japanese Gnus tips (which is written in Japanese, sorry).

By the way, many sendmail MTAs tend to decode base64 or qp to
8bit in the message body arbitrarily.  Here's an example:

  Content-Type: text/plain; charset=euc-jisx0213
  Content-Transfer-Encoding: 8bit
  X-MIME-Autoconverted: from quoted-printable to 8bit by mail.foo.com...

It is anxious about me in whether this does any bad influences.
Hal, isn't such a thing in your mail files?
-- 
Katsumi Yamaoka <yamaoka@jpl.org>