Hi rowenaflynn We don't provide phone support, just support on this forum. It could be you changed your password and or an issue with your email provider. I suggest asking your email mail provider's support as well. Please try Thunderbird Troubleshoot Mode: https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbird 1. If that fixes the issue, please let us know! 2. 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 e.g. gmail, what 3rd party software like add-ons, anti-virus or firewalls you are using Cheers! ...Roland