How to add new real-time blacklists (RBLs) to Endian Firewall 2.1.2 One of the great things about Endian Firewall is the ability to use real-time blacklists (RBLs) to keep spammers off your mail server. Endian Firewall 2.1.2 ships with a number of good RBLs. I’ve seen good results with Spamcop and the Spamhaus Zen list. I wanted to add the Passive Spam Block List, but...