[ChrisNorstrom]

I get more false positives than false negatives. But when I switched to out Outlook 2007 for half a year (got my hands on free Office 2007 launch kit) That was the first thing I noticed. Outlook, at least for me, had amazing spam control right out of the box. Everything else was dreadful but the spam control was amazing. Then again, I tend to have email addresses from almost 10 years ago when I was 15.

Maybe its because I'm using a portable version of Thunderbird. Although it shouldn't matter.

[pdwetz]

No, it's not just you. I've had an unhappy experience with the spam filters (with a normal Thunderbird install) for years now. It seems to miss things that are obviously spam (to a human); thankfully I haven't had too many false-positives... that I've caught, at least.