To import PST files into Thunderbird account, you can use the Outlook Converter Tool. It imports Outlook PST files into Thunderbird, Gmail, Yahoo, Office 365, and other email clients. The tool also enable users to convert PST files into MBOX, EML, MSG, EMLX, PDF, etc. Its user friendly interface make the conversion task easy even for the non-tech users.

If you are looking for the safest way to import Outlook PST emails to Thunderbird, the advanced ConverterTools Outlook PST Converter tool is an effective solution. It helps to save the Outlook PST data to numerous kinds of email clients, for example, Thunderbird, Gmail, Hotmail, Yahoo Mail, Opera Mail, etc., including attachments. It can easily transfer PST emails to multiple file formats, for example, EML, PDF, MSG, MBOX, etc. However, it has the advantage of maintaining the folder hierarchy as per the original files. There is no requirement to have MS Outlook on your device while using this tool for PST migration.