Custom Weighting of IMF

It is possible to create exceptions to bypass IMF in Exchange 2003 SP2.  The custom exceptions look for certain word or phrases in the body, subject, or both.

See the following URL for details:
http://www.msexchange.org/tutorials/Intelligent-Message-Filter-version-2-IMF-v2.html

 Step 1: register dll: regsvr32 Drive_letter:Program FilesExchsrvrbinMSCFV2MSExchange.UceContentFilter.dll

Step 2: create xml file: drive_letter:Program FilesExchsrvrbinMSCFv2MSExchange.UceContentFilter.xml

Step 3: Restart SMTP Service