I share your frustration. I've had the same problem here for more than
a year. The only thing I would add is that if I try to 'replace the
existing item', I often get a warning, "The operation failed. An object
could not be found."

Outlook 2003, sp2, Cloudmark Spamnet add-in Exchange 2003 (6.5, sp2) XP
pro, sp2

I suspect others on the forum who note that 'suddenly we had 7000 spam
messages show up' in the conflicts folder probably hadn't done a folder
view in a while.

Others reading this may want to check their conflicts folder (in
Outlook 2003 "Go", "Folder List") and see if there are items lurking
there.

Any insight on the problem would be much appreciated.