posting by email – pb with foreign encoding

. The original method to blog by email fails to accept and encode properly special characters (like éèàù & Cie, which are commonly used by most european people, among others)
ref : http://wiki.ww.wp.xz.cn/How%20To%20Blog%20By%20Email
. I’ve installed the “wp-mail mod update” plugin, and it works fine with the subject field, but not with the body of the mail/post
ref : http://blade.lansmash.com/index.php?p=93 (the plugin)
+ http://topsecure.lautre.net/jmm/wordpress/ (if you want to see the encoded difference between the subject and the object of a post by e-mail)
. seems like it could be resolve by “hacking” the wp-mail.php and/or mimedecode.php (as the solution seems to rely on those 2 files), but I failed to find any relevant answer in order to improve the code ;-(
If anyone can solve this problem, it could help non-english blogs to be updated by email properly, & we could add this to the wiki. Thanks