my non-profit uses sbs 2003 and exchange. I thought exchange had a built in spam filter, however, we are getting a ton of spam. I googled this for hours and it seems that SBS has no spam filter, only server 2003 has it. Any suggestions on what to use? The desktops are outlook 2003 and 2010. Outlook cannot seem to be setup to use rules with exchange mail. As we are a non-profit a free program would be great.