Use the professional Yota Thunderbird Migrator Tool to migrate Thunderbird emails to Gmail, Office 365, Yahoo, etc. I recently import Thunderbird to Gmail with the use of the Thunderbird Migrator Tool. I find it difficult to perform this process manually. But this tool makes this process so easy. This easy solution will allow you to export all the emails from Thunderbird to Gmail in bulk with attachments. It will allow you to specify filter options according to your needs, like date ranges, keywords, or file size. You can also try the free version before making the full commitment. This tool is easily compatible with all Windows operations, such as Windows OS, including the latest version, Windows 11.