Title: Configuring a Spam and Attachment Filtering SMTP Relay on the ISA Server 2000 Firewall - Part 1: Installing and Configuring the SMTP Services and Remote Domains Author: Thomas Shinder Summary: Spam is a major threat to the Internet and corporate networks today. Spam clogs Internet routers and gateways, usurps bandwidth on corporate Internet links, and consumes processor cycles and disk space on corporate SMTP relays and mail servers. Criminal spammers are using increasingly sophisticated techniques to circumvent spam filtering applications. The more complex the spammer?s attack methodologies used to avoid detection, the more processor intensive the spam whacking applications must be. These processor cycles are robbed from other applications and services running on the same machine and often require that you dedicate a single box to spam filtering. This two part article shows you with detailed step by step instructions on how to make your ISA Server 2000 firewall into a front-end spam filtering SMTP relay. Link: http://www.MSExchange.org/pages/article.asp?id=606