Using Office 2011 on a MAC 13 inch Air

Gmail address

Constantly, over 30 times a day lately, receive the message

"Mail could not be received at this time.

The server for account TWC returned the error (ALERT) Too many simultaneous connections (failure). Your username/ password or secutity setting may be incorrect. Would you like to try reentering your password?

YES     NO

Regardless of which one I select, it returns okay for a few minutes......