FAQ

This error on Linux/Cpanel servers normally indicates that the disk quota of that account is full. Upgrade the account or reduce usage and retry.

“Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Error Number: 0×800CCC0F”

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