Originally posted by: Nothinman
Mozilla.
I use Netscape/Mozilla Mail. It is the only program that has the features I want besides outlook.
Be aware that Mozilla is still a work in progress and the mail client has some nasty little bugs. I have it setup to check 4 email accounts. Someone working on the client doesn't reset a counter somewhere and if you add and remove an account it screws it up. Of course if you look at the prefs.js then it is easy to see the error and fix it.
It is a known bug in bugtracker so it should get fixed eventually.