If you are looking for a reliable method to extract PST files in Thunderbird? If yes, then you can try this PST to MBOX Converter software, it is best email converter tools. This software can convert multiple Outlook emails to Thunderbird with attachments. It offers preview facility to view all loaded data items before the final process. It allows you to batch extract PST files in Thunderbird without Outlook and Thunderbird installation. There is no file size limitation, you can move a large size files without any single data loss. It was compatible with all the versions of MS Outlook and Windows OS including Windows 11.