“Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Error Number: 0x800CCC0F”
This error is often modem or firewall related. First, try reconfiguring as per the tutorials at http://www.nettigritty.com/support/hosting/tutorials/emailtutorial.php
If the issue persists, please see:
http://support.microsoft.com/?kbid=813514