Solution for McAfee treating the w3wp.exe process of outgoing emails as a spamming worm:
1. Right-click on the small McAfee icon in the system tray at the bottom right corner of the screen, and open the "Virus Scan Console."
2. In the pop-up interface, select "Access Protection" and double-click to open the "Properties" dialog box.
3. Select the option "Prevent mass-mailing worm from sending email" under "Ports to block," and click "Edit"...