Hi Jon, I'm sorry to hear about the trouble you're facing with your Thunderbird Inbox. It sounds like your messages might have been archived automatically. To locate your archived messages, go to the "Archive" folder in Thunderbird. If you don't see it, you can check your Thunderbird settings to ensure that automatic archiving is properly configured. You can do this by going to "Tools" > "Options" > "Advanced" > "General" > "Config Editor" and searching for "mail.autoArchive." Make sure it's set to "true" if you want automatic archiving. If your messages aren't in the Archive folder and you don't have any backup, it's advisable to reach out to Thunderbird's official support for further assistance. They might have additional steps to help you recover your lost messages. Hang in there, we'll work to get this resolved!

Hi Suram, Thanks for taking the trouble. Sadly, I looked everywhere including right clicking all folders, there is no tools button, 'options' or 'advanced' under settings. I even searched those 3 terms, nothing. No config editor either. I did however find the emails. They were in a new file, named as per my account name, in the deleted folder. Now I am 100% sure I did not delete them. How do I get them back to the inbox, can I just drag and drop that folder back to the inbox? Thanks. Jon