It seems like Thunderbird is no longer "linked" to my Excel or other programs. I used to be able to "Save and Send" from Excel and "Send As Attachment" and seemlessly, a thunderbird email message would pop up with my attachment attached so all I needed to do was type in the recipient's email address and message and hit send. Now, I get a message (after clicking Send As Attachment) that says: General Mail Failure. Quit Microsoft Excel, restart the mail system, and try again." And doing so does not solve the problem. How do I reconnect Excel to Thunderbird? I suspect somehow they got disconnected. Thanks for any help you can give!