I have made some test with SmarterMail on my site. Subjects of all non-English messages (I have tried Finnish and Swedish) get prefixed with "SPAM-HIGH". This is propably the reason why automatic forwarding doesn't work with those messages. Everything works fine if subject and body of incoming mail are in English. What can I do to fix this problem? Most of my incoming messages (subject and body) are in Finnish.
I'm a little confused. You have a web site that sends out emails. The emails go to where? I suspect it is a Winhost email server right? Why don't you go to the SmarterMail and under settings adjust the content and spam filter?
