I have spent at least an hour troubleshooting this. Earthlink says its a Firefox problem. Problem doesn't occur in Internet Explorer. I have tried all the troubleshooting steps (restarting, clearing cache etc, starting in safe mode, disabling addins, creating a new profile, installing the latest version, etc. Nothing has worked. I need help! I can receive email, but when I hit send, the send box grays out and nothing else happens.