I'm using a Linux box running Postfix and SpamAssassin in front of my Exchange 2000 server... this setup really works well for us! No plans to migrate to Exchange 2003 in the immediate future. -- Shawn Beairsto Network Administrator Data Kinetics Ltd. -----Original Message----- From: HERRITZ, CARLA [mailto:CMHERRITZ@xxxxxxxxxxxx] Sent: Tuesday, January 13, 2004 4:17 PM To: nospam@xxxxxxxxxxxxx Subject: [nospam] what is everyone using for a spam blocker? Has anyone used Microsoft Exchange 2003 features? Thanks, Carla