It's a free sorta outlook thing but much better <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" /> (one of the reason is cause it's free <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" /> ). I'm very happy about it <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />.
You do know what outlook is don't you?? <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />

Since you don't know thunderbird, do you know firefox? if not, use google, and download it <img src="/ubbthreads/images/graemlins/tongue.gif" alt="" />

Yeah, I got 50 invites too, didn't noticed till now <img src="/ubbthreads/images/graemlins/tongue.gif" alt="" />, but at first the invites were at the upper right of the page, now they are in the left middle <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />