Sending of the message failed. The message could not be sent using Outgoing server (SMTP) mail.specializedpump.com for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again This is what I have been getting since my Thunderbird auto updated. I have been unable to send email. It forces me to use a different program, however all previous emails I have received I can not forward to myself or read or reply since they are in thunderbird. I am really upset, and bothered that something SO MASSIVE and SO IMPORTANT as sending email is the one thing it doesn't do, yet designed for receiving and sending emails. I need this fixed. Thank you Darren