Check the address for typing errors such as ww.example.com instead of www.example.com
   If you are unable to load any pages, check your computer's network connection.
   If your computer or network is protected by a firewall or proxy, make sure that Thunderbird is permitted to access the Web.

all of a sudden when I opened my email I get the below message? how to I fix this? Server not found live.mozillamessaging.com could not be found. Please check the name and try again. Check the address for typing errors such as ww.example.com instead of www.example.com If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure that Thunderbird is permitted to access the Web.