Who I have the same questioned this topic

I have Spam Detector turned on.

In the Spam Detector folder I only see messages that I have marked as spam.

I do not see any that are moved there by Spam Detector itself.

Does Spam Detector work in such a way that I have to leave files in that folder?  I assumed that that purpose of the folder was to see what had been detected so I could check whether a message was in fact Spam.

Am I correct in assuming that files marked as spam by Spam Detector would appear in that folder as "uread"?

Is there a link that explains more about Spam Detector?