Do you want to import Outlook folders to Thunderbird? If yes is your answer, then you can use a professional PST to MBOX Converter software. It is one of the best tools to directly import Outlook folders to Thunderbird within a few simple steps. There is no file size limitation, one can export a large size of PST files to Thunderbird directly without any data loss. During the process, the software keeps all the folder structures without having any changes. It allows you to batch import Outlook folders to Thunderbird without any problem. This software supports all MBOX based email clients like Thunderbird, Apple Mail, SeaMonkey, and many more. It was compatible with all the latest and below versions of MS Outlook and Windows OS including Windows 11.