RBLmon is a fully automated online service, which allows you to monitor your IP addresses against the most popular and commonly used real-time blacklists (RBLs). The RBLmon application will send an immediate email notification as soon as any of your IP addresses are found in the list of monitored RBLs. Introducing IP Lables - March 8th, 2012 The long-awaited feature allowing our customers to assig