Hi,
try the IMF from Microsoft
The “Exchange Server Intelligent Message Filter Overview” white paper for Microsoft Exchange Server 2003 is available
http://support.microsoft.com/default.aspx?scid=kb;en-us;842763
Microsoft Exchange Intelligent Message Filter Deployment Guide
http://www.microsoft.com/downloads/details.aspx?FamilyID=b1218d8c-e8b3-48fb-9208-6f75707870c2&DisplayLang=en
Exchange Intelligent Message Filter
http://www.microsoft.com/downloads/details.aspx?FamilyID=c1b08f7b-8caf-4147-b074-8c9c8f277071&DisplayLang=en
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