find PHP-mbstring and PHP-iconv packages
and urpmi both for sendmail UTF-8 into locale charset (big5)
Code
$subject = mb_convert_encoding($subject,"big5","utf-8");
$mail_message = mb_convert_encoding($mail_message,"big5","utf-8");
$mail_message = mb_convert_encoding($mail_message,"big5","utf-8");
Take preferences on the following site
http://wi777.homelinux.net/index.php
