You know what would be cool? An extension for Thunderbird which adds a column to the message display showing junk mail score from the naive-Bayesian filter, and also some UI to change the threshold.
Currently, my junk mail filter gets almost no false positives, but normally misses a few messages which seem obviously junk to me. It would be useful to know what the scores are, and be able to adjust the threshold to try and catch some more.
Any experienced extension author feel like building one? (I would say “knocking one up”, but someone pointed out last time I used that phrase that it can mean something else the other side of the Atlantic.) Or maybe it exists already?