This actually isn't the right forum for Drools questions. Drools mailing list is here http://www.jboss.org/drools/lists. Register to their user mailing list to ask questions related to Drools. But before doing that take a look at the Drools project page http://www.jboss.org/drools and see if you can find the relevant documentation.

Yes, there's a link on that page which says "Subscribe to the user mailing list". Follow those instructions to subscribe.