Is there an expert in the house?

Somehow, I did something to screw up the scoring system for the junk folder. All of my perfectly good emails are coming in with a junk score of 100, which means that I never get any email in my Inbox (spam, on the other hand, gets much lower scores, since 100 is the highest possible one). I always have to go to the Junk folder after downloading, and tell Eudora that they’re not junk, to transfer them into the Inbox, but it never seems to learn. Anyone have any idea what the problem might be?