How to "zero out" the Junk detector?

Hi all...

   One of my users showed me that their Junk folder was full of Junk
marked as "99" that was coming from real users (and not flagged as junk
by our internal SPAM headers.

   I thought perhaps he was filtering users incorrectly, but he has no
filters either.

   So...

   Where is the file that contains the "trainable" junk filter
information for Mac Eudora?  I'll want to delete that to see if that
resolves the problem for him.

   Thanks!

- Steve