Abstract:  Enterprises are becoming increasingly interested in easy-to-use email encryption, as a wide variety of privacy and data protection regulations now apply to small, medium and large organizations across a wide variety of industries. Effective secure messaging technologies keep sensitive information private, prevent anyone from tampering with the contents of messages and authenticate the identity of both the sender and recipient. And all organizations, regardless of their size, require encryption to be both user- and IT-friendly.

This guide is designed to provide you with essential information about how to harden your Microsoft® Exchange Server 2003 environment. In addition to practical, hands-on configuration recommendations, this guide includes strategies for combating spam, viruses, and other external threats to your Exchange 2003 messaging system. Although most server administrators can benefit from reading this guide, it is designed to produce maximum benefits for administrators responsible for Exchange messaging, both at the mailbox and architect levels.