I second Eudora or Mozilla thunderbird. I use both. Eudora is really a sweet program and would be my first choice. I use several email programs to parse out my email addresses, though in this day and age it's easy enough to manage them all in one program. The Eudora I use is the free one that has an ad in the lower left corner, so it is full strength except for that. You can find out from people like BillD about spam filters that are free if you want to filter more than your ISP does already.

SRS