Windows Mail server unexpectedly terminated the connection

Hi there friends,
I am having problems with Windows Mail. It stopped working today and gave the following error:
“Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'pop-server.nyc.rr.com', Server: 'pop-server.nyc.rr.com', Protocol: POP3, Port: 110, Secure (SSL): No, Error Number: 0x800CCC0F”
I do not know what this means or how I can resolve this. Please help me understand this so that this does not happen again. Please also provide a solution to this issue.
Thanks a lot.
