The program is a server-based e-mail security and management solution for Microsoft Exchange, Lotus Notes, and Novell GroupWise, as well as any other SMTP-based e-mail system. Designed as an integral add-on for LAN-based mail systems, TFS Secure Messaging Server is transparent to the end user; policy-based; and provides a comprehensive encryption security, content filtering, and gateway connectivity solution for an organization's e-mail system. The products central administration of digital certificates makes it possible to protect an organizations users from spam and viruses by allowing easy implementation of email white lists.