Hi all,
I had a same problem, and I found the solution.
If this problem is occured, you should to do the followings:
- disable mailfilter module
- connect to the LDAP with your favorite LDAP editor like Apache Directory Studio (not in the Users and Groups)
- delete the ham and spam entries from the ou=Users
- run the "mailfilter-ldap update" script to make all neccessary changes on the LDAP tree and the system
- restart the mailfilter module
If it returns no error, you done.
Enjoy the spamless world...