Locking Down E-mail.

This article reviews several computer software that provide excellent end-to-end electronic mail security. PGP Universal is a pure e-mail security product, providing mail encryption, anti-virus scanning and attachment filtering, along with PGP's zero-footprint Web-mail interface, Web Messenger. Universal does allow administrators to easily create different encryption and signing policies for various mail domains and to quickly manage individual user's keys. Sigaba Secure Email 5.0 takes a granular view of secure mail processing through extensive use of rules and object lists. SendAnywhere is Sigaba's zero-foot-print delivery technology and Sigaba Vault provides a secure Wen-based portal system. PostX Enterprise Platform 5.0 provides e-mail security by mixing in advanced mail routing capabilities with WebSafe, one of the better Web-mail portals going. PostX provides a flexible way of sending secure e-mail without requiring client-side utilities or plug-ins, while still giving businesses control of user authentication. Tumbleweed Secure Messenger 6. has a very powerful and flexible policy engine that allows businesses to create rules based on domain, message, and user among other things. Secure Messenger also performs virus scanning, spamfiltering and content filtering.