just letting you guys know about an email client made by Mozilla called thunderbird. after being dissapointed with Mail, the app that comes on your mac, i found out about this email client called thunderbird. i set it up with my IMAP mail account and it works great. when i make new folders or delete messages it changes them on the server thing too. (might not make sense, hard to explain) but i recommend you check it out. heres a link:
http://en.www.mozilla.com/en/thunderbird/