How to convert PST File to Thunderbird?
With eSoftTools Best Free PST to MBOX converter, I strongly recommend converting the PST file to Thunderbird. It can show an email preview of the PST files for conversion. PST files can be converted to UNICODE and ANSI formats. The free demo version is available to all users. In this demo edition, you can free of charge convert 25 e-mail items from each PST folder.\
More information:- https://www.esofttools.com/pst-to-mbox-converter.html

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Maria Smith commented
The best method to convert PST files to Thunderbird is by using the DRS PST File Converter tool. It can transfer PST into multiple other file formats and email clients. The application is very simple and safe to use. This utility can also delete your duplicate emails at the time of conversion. Users can select specific emails by using the Mail and Task Filter feature. If you want to know about its functionality, then you can try its free demo version and convert 50 emails per folder for free.
Read More - https://www.data-recovery-solutions.com/outlook-pst-file-converter.php -
Technical Content commented
One more tool available, you can try https://www.softweak.com/converter/pst-to-mbox.html
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Manoj Sharma commented
You can easily convert PST to MBOX with attachments with the help of a new Outlook PST converter tool. The tool is specially designed for this purpose and converts the multiple PST files into MBOX file format without any data loss. Plus a user can convert the PST files into various other formats including EML, PDF, EML, HTML, etc. So, use the Outlook PST converter tool for a safe, secure, and robust conversion process.
Read here: https://www.recoveryandmanagement.com/how-to-convert-pst-to-mbox/
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Liza Soberano commented
I would like to share with you another smart software i.e. CubexSoft PST Converter for Windows & Mac OS. This software can convert PST files to Thunderbird email client directly with attachments without any data loss.
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Travis Wilson commented
In case you are searching for a reliable solution to convert PST files into Thunderbird then you should opt for the professional software approach to accomplish this task. In this regard, I have used the Cigati PST File Converter that helped to import PST files into Thunderbird directly.
In case you want to analyze the performance of this reliable utility then you can try its free trial version that will allow you to convert the first 50 emails per folder.
Learn More: https://www.cigatisolutions.com/pst-converter/
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Ahana commented
If you want to Import PST files into Thunderbird Outlook Outlook then try the PST to Thunderbird Converter tool. This tool is a reliable and advanced solution to import the Outlook PST files into Thunderbird. This tool has a feature to convert the PST files into multiple Email clients like Gmail, Office 365, Yahoo Mail, Zoho Mail, Yandex Mail, HostGator Email, etc., Use this tool if you don't want any problem in accomplishing your task timely.
For more info:- https://www.mailconvertertools.com/blog/import-pst-files-into-thunderbird-without-outlook/
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EDB to PST Converter commented
The best method to repair the Outlook PST file is here, using SysInspire PST converter software. This software repairs your Outlook pst file that has been corrupted and smartly converts your pst file in just a few seconds. It converts PST into EML, EMLX, HTML, MSG, Zimbra, vCart, and many more formats. To install this software you need a Windows operating system because it is only capable of running on Windows OS. Convert 25 emails from each mailbox in the free demo version. Download now.
Read more:-https://www.sysinspire.com/pst-converter/