Whenever I try to send a message, I get this "Send Message Error - Sending of the message failed. An error occurred while sending mail. The mail server responded: [email protected] sender rejected. Please verify that your email address is correct in your account settings and try again. We have talked with Shaw and they say it is not their problem. My wife ([email protected]) has no problem. I can get my email and send if I got to Shaw's website, but obviously I don't want to do this all the time. I want to use Thunderbird.