Hello - Thunderbird started showing a "Syntax" error yesterday for incoming email. But, I can not send email either. I can receive email from from server to a different desktop and phone. So it appears to be something on this computer, which is a Windows 10 and Thunderbird is 78.9.1 (64). Also, when I tried to "Repair" the "Inbox" folder, all the email disappeared. And the repair did not work. Thanks.....