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Content filter product recommendations

I was able to reduce spam by about 70% but still have that other 30% that I would like to whittle down. My thought is to add a content filter on the server, but I haven't found one yet. I was thinking I could filter out e-mails with words like "Cialis," other drug names, etc. I have Exchange 2003. I prefer an open-source content filter if you know of one. Thanks.

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This was first published in March 2005

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