Suggestions on OS X e-mail application

[pensfan]

Does anybody have a suggestion for an OS X e-mail program other than Entourage (which I'm using now) or Apple's Mail that can handle multiple accounts and has a calendar/address book?
Thanks,
Kevin

 

[toast]

Eudora ?

 

[aisikl]

totally agrre -- eudora was, is and will be my favourite email app -- a lot of people object to it because of its outdated UI, but then again, it's the only email app i know where there is never one central window open (as with outlook, entourage, mail) and that's exactly what i like about it --