Ed,
Thanks for the quick reply!
Yes, all the headers indicate Spam Assassin is working (X-Spam-Status, etc.), I am just wondering if the actual spam messages get discarded even though I enabled the Spambox option.
Normally I would have average of 10-15 spam emails a day, but now I got none. So if Spam Assassin is working, I should have some spam emails forwarded to the spambox. Well, unless the spammers are having a new year break

.
So do you suggest I remove the "spam" folder I created a wait a little bit?
Jerry