Originally Posted by Horfic
The spam system works like this:
Every email gets a number(1 no - 10 total spam) which indicates the likelyhood of spam.
You change with the plugin the number, which tells the system that all above the number should be marked as spam.
PS: I hope thats correct^^
Yes that's pretty much correct... Spamassasin also puts this number in the message's header as X-Spam-Score