I just saw this yesterday on newoin.net under their software section. It is supposed to let you access your Hotmail from Eudora, Outlook, etc. According to the description, tt looks like you should be able to write something using Net::SMTP do what you want to do.

Hope that helps!

Update: Upon further reading, I've found out that it will only let you process the first 100 messages and after that you have to pay $17.50 for the program.