Customer is complaining that the Internet is very slow. After some troubleshooting, I have determined that SMTP is causing the issue. The server is an SBS2003 running Exchange. When pinging with the SMTP service started, the reply is 3000-4000ms. When stoping the SMTP service, the ping reply drops down to a reasonable 20-40ms. I checked the queue in System Manager but it is empty. Any ideas?