How to export Mailbird to Thunderbird? If you are also searching for a solution to this query, then download Mailbird to Thunderbird Converter. It’s a simple to use application that allows both technical and non-technical users to effortlessly export Mailbird to Thunderbird. The tool auto-detects Mailbird mailboxes from its default store location. You can also add Mailbird folders from any other location using its Select Files and Select Folder options. Use its advance filters to export Mailbird to Thunderbird email application, selectively. Free demo of the tool is also available to help users know how to export Mailbird to Thunderbird, but with the restriction of first 25 items per Mailbird folder.