Hello, I receive the following message when opening my windows live mail account

Unable to send or receive messages for the Frontier (letinsh.rol) account.

Server Error: 0x800CCC90
Server Response: -ERR inactivity timeout
Server: 'pop3.frontier.com'
Windows Live Mail Error ID: 0x800420CD
Protocol: POP3
Port: 110
Secure(SSL): No