U.S. Monitor’s mail monitoring and list protection service answers these important questions: Is your mail delivered? How long does it take? Is your list protected against unauthorized use? Our dedicated, experienced network of agents and qualified, professional representatives provide reliable delivery data, along with accurate and timely reports. With Mailstream Intelligence, you now get real-time delivery dates for all your direct mail. U.S. Monitor, your source for mail monitoring and list protection since 1973.