I missed this over the summer, tasked on other products and projects, but if you haven't read the Microsoft Exchange Server 2003 Security Hardening Guide yet, go download it now.

Updated July 21, 2005, and available in 9 languages, the 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 Server 2003 messaging system. While most server administrators can benefit from reading this guide, it is designed to produce maximum benefits for administrators responsible for Exchange Server messaging, both at the mailbox and architect levels.

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