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.

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