I posted the patch to sf.net.
http://sourceforge.net/tracker/index.php?func=detail&aid=1429851&group_id=139281&atid=742847
* The language code is incorrect-recognized
* A multi-byte folder name cannot be handled
* The problem of wordwrap
* Processing of a MIME header is defective
* The problem of character encoding at the time of e-mail creation
* Processing of a htmlentities is defective(in program/lib/DB/storage.php)
* 'text_encoding' was specified appropriately(in program/steps/mail/sendmail.inc).
 
I want everybody's advice.
Thanks.
 
--
Tadashi Jokagi
mailto:elf2000@gmail.com