Zombie SMTP

Zombie SMTP is a tool written to help interrupt spammers' activity. It pretends to be an SMTP server but all it really does is hold onto a connection for 20 mins if the source IP address of the connection is registered in one or more of the pre-defined RBLs. The purpose of this is to simply waste spammers' time if they try to connect to Zombie SMTP to relay their spam. Any connection from a machine not listed in the RBLs is automatically disconnected, this is to prevent authentic servers from tying up their resources who for some reason try to connect to this SMTP server.