I have a small site 5 pc's running vista 1 server running 2003 sbs. I have an intermittant issue of lots of spam in the smtp queue. Not NDR\'s definite spam. The server is not actinga as a relay and I have ran numerous malware/virus scans to no avail. I have also have AVG tech support check there machines.If you inspect the header of the mail from the queue it appears to come from an external IP address (Thailand).How dow this appear in the internal smtp queue. Any advice appreaiated