TDS-3 Common Ports Check Plug-in consistently reports that port 25 (SMTP) is open (Windows XP Pro - all updates installed); yet Port Explorer and NETSTAT do not show this port open. Have rebooted several times, and yet Common Ports Check Plug-in consistently shows this port open (while no other tool sees the port open.) Does anyone else see this behavior? Any thoughts/suggestions? Best regards, Mike P.S. Two independent external port scans confirm Port 25 not open through the firewall.