Time spent by employees removing spam from their inbox is time better spent on a task that actually contributes to the growth and profitability of your company.  This article goes beyond the basic enablement of Amavisd, ClamAV and SpamAssasin by showing autolearn Bayesian filtering and how to stop the ever so trendy file attachment spam.  Also covered is Greylisting and the popular new Razor-agents as well as several options of the postfix UCE Controls section of Insight Server. Do your company a favor and let Insight Server put a can on spam.