Lars Magne Ingebrigtsen <larsi@gnus.org> writes in ding@gnus.org:
> Content-Type: text/plain; charset=iso-8859-1

This should be `iso-2022-jp' as the message contains iso-2022-jp
encoded characters.  Automagically figuring out the charset is one
area that tm is very strong at, so there's probably some code there
to be reused.

The way I composed this message was to add `text/plain' tags around
the line containing Japanese and tm autodetected what charsets to put
in the MIME headers.

> SL Baur <steve@xemacs.org> writes:
>> Subject lines don't appear to be getting the funky MIME quoting, and
>> all I'm seeing the body are tildes.  I'm running XEmacs/Mule in a
>> Japanese locale.