Why is this error coming "Error Number: 0x800CCC0F" in Microsoft Outlook Express continuously?

I am getting problem whenever I’m trying to send Email using Microsoft outlook express 2007. I am getting this error message “Your server has unexpectedly terminated the connection. Error Number: 0x800CCC0F” please help me in resolving this error.
 
Possible causes for this include server problems, network problems, or a long period of inactivity. I assume that you’ve ruled these out.

The problem may also occur if you have an antivirus e-mail protection utility enabled, which checks the mail as it comes in from your Post Office Protocol (POP) server. To test this, disable the antivirus e-mail protection utility as well as the Windows Firewall.

Another likely cause is that there is a message that is either too large or corrupt in some manner. Logon to your servers Webmail site and delete the offending message there.

For more advice, look here:

http://support.microsoft.com/kb/813514
 
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