I have a project on the back-burner for something like this. POP3 downloads the messages. You probably need POP5 which allows you to inspect and selectively download messages?

The last time I looked at this, the POP clients that I needed weren't ported to ActiveState Perl yet and were only available on Unix Perl 5.8 and above. There were some other problems in that the more advanced POP clients did a better job of parsing these multi-part fancy e-mail messages. I would be curious if other Monks have gotten fancy e-mail clients to work on ActiveState. It turns out that parsing an e-mail from many clients with potentially many attached files is non-trivial.