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This article lists common scenarios that have solutions that are described in the Using the ISA Server 2004 SMTP Filter and Message Screener document. To download this document, visit the following Microsoft Web site:
Microsoft Internet Security and Acceleration (ISA) Server 2004 includes two components to help prevent mail relaying, the entry of viruses, and unwanted attachments on the network. These components are the Simple Mail Transfer Protocol (SMTP) filter and Message Screener. Message Screener is an optional ISA Server component. You can install Message Screener separately from ISA Server and from ISA Server Management.
Using the ISA Server 2004 SMTP Filter and Message Screener discusses when and how to configure the SMTP filter and Message Screener. The SMTP filter must be configured in the following scenarios: