Hi Marilyn Sorry to hear about your issues with your email being suddenly gone from 2 separate accounts Please try Thunderbird Troubleshoot Mode: https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbird If that fixes the issue please let us know! If it doesn't: Please provide the following troubleshooting details to help us help you: Please let us know what version of Thunderbird you are using, your operating system e.g. Windows 11 and your email provider i.e. it sounds like you have 2 accounts, what providers are they on?, what 3rd party software like add-ons, anti-virus or firewalls you are using? Cheers! ...Roland