Information on Outlook Express Email Error 0x800ccc0f occurred

Information on Outlook Express Email Error 0x800ccc0f. I received an error message at the time of using OUTLOOK.
Why is that?

Some errors while processing the requested tasks. Please review the list of errors below for more details.
Errors
Your server has unexpectedly terminate the connection. Possible causes for this include server problems, network problem or a long period of inactivity.Account 'mail.yourdomain.com', Server 'mail.yourdomain.com', Protocol: POP3, Port 110, Server (SSL) No, Error number : 0x800CCC0F
