I'm having a little problem(newbie

), I have slackware 10.1, kde-3.4 and kernel 2.6.10 . My default E-mail client is thunderbird 1.0.2, and I pretty much like it, but I wan't to get notified when I get mail(maybe check for new messages every 3 minutes) but I have to run thunderbird manually everytime I start my computer, to get this feature, any ideas how I can fix this... maybe always get thunerbird in "system tray" when I run the computer, how? can I get popup when I get mail?
Greeting
Siggiae