The project’s mission is to stop mail abuse, globally.
We know that there are a lot of solutions out there, which claim that they could stop spam, but they are really not effective.
If they could work, logically, you would have no reason to visit this website :-)
Using filtering software that accepts mail and then "marks spam as such" or “moves it to a spam folder” is a complete nonsense, because the spammer has already achieved what he intended to do:
THE CRAP WAS DELIVERED TO YOUR SYSTEM! Whether you read it or not does not matter to the spammer!!!