Obtaining and Installing IMF
Microsoft's original plan was to distribute IMF only to customers who had purchased a Software Assurance (SA) license. However, that strategy was unpopular, and after what I assume was a vigorous internal debate, Microsoft did an about-face and released IMF free to all Exchange 2003 customers. You can download IMF from Microsoft's Downloads for Exchange Server 2003 page at http://www.microsoft.com/exchange/downloads/2003.asp. Scroll down to the Security and Protection section and click the Exchange Intelligent Message Filter link. At the resulting page, download the filter and click the Microsoft Exchange Intelligent Message Filter Deployment Guide link. You should download and read the guide before attempting to deploy IMF.
The process of installing event sinks on an Exchange server isn't for the faint of heart; you have to put the sink in the correct place, then register it properly so that the SMTP core can find and call it. It's easy to make mistakes when doing this manually. Fortunately, IMF comes packaged as a Windows Installer (.msi) file that does all the work. All you have to do is launch the .msi file and tell Windows Installer whether you want to install IMF, the IMF management tools, or both. You can install the management tools on any machine on which Exchange System Manager (ESM) is installed, but as I mentioned earlier, you can install IMF only on an Exchange 2003 server. . . .
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