Boasting delivery rates of over 5MM messages per hour, eAlert from MIS Sciences is the nation's leading emergency alert notification system. eAlert's clients include the US Department of Homeland Security, the US Department of Defense, transit agencies, and several 911 emergency operations centers. These clients have diverse and complex sending characteristics with regards to prioritizing message delivery through various devices and configuring IPs. As the chief crisis management solution nationwide, it is essential that eAlert utilizes a delivery system with maximum reliability, delivery performance, and reporting features to meet its clients' demands and provide time-sensitive alerts and messages to each type of audience and device. PowerMTA was the only SMTP server software flexible enough to supply these necessary features and easily integrate into eAlert's current system without interruption.