Rob,
Needing to apply Chinese emails on your great plugin. I managed to fix the body by adding:
case "big5":
$body = iconv("BIG5","UTF-8",$body);
break;
case "gb2312":
$body = iconv("GB2312","UTF-8",$body);
break;
But I am unable to fix the email subject line. I found your line for:
//This is for ISO-2022-JP
I have no idea how to do a similar thing for Big5 and GB2312. Can you please fix it for people like me?
Thanks.