Understanding gateways Gateways are a bridge between your system and other devices or systems. There are two major types of gateways: server-to-server and third-party. The purpose of either gateway is to transfer mail, conference content, and Directory information to another messaging server. Server-to-server gateways connect two FirstClass systems directly, while third-party gateways allow FirstClass servers to exchange mail and synchronize directories with foreign mail systems. Top For more information Gateways Understanding gateways and routes