* 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.