Stands for SNA Distribution Services, the e-mail messaging transport protocol for IBM’s Systems Network Architecture (SNA). SNADS is a mainframe host-based messaging system that is commonly used in SNA networking environments. Microsoft Exchange Server includes a connector for enabling messaging connectivity between SNADS mail systems and Exchange servers.
You can use Microsoft SNA Server to provide the underlying network connectivity for this connector to function. The SNADS connector allows Exchange Server to leverage the functionality of existing host-based messaging systems such as AS/400 and System 3x during migration to a distributed client/server-based environment.