Microsoft Outlook is part of the Microsoft Office suite invented by Microsoft. The main use of Outlook is email management. Furthermore, it gives task management, note-taking, journal management, contact management, etc. In most of the companies, it works in synchronization with the MS Exchange Server. Though, it can also be used as a stand-alone application.

Alternatively, Mozilla Thunderbird is free; cross-platform invented by Mozilla. It works as an email, newsgroup, and chat client. Using this app, you can easily organize various email, newsgroups, and news feed accounts, etc. Moreover, it offers features such as quick search, advanced message filtering, saved search folders, message grouping, etc. Having multiple features, one might consider moving from Outlook to Thunderbird. But, there could be numerous other reasons to restore Outlook backup PST in Thunderbird.

In any of the cases, it is suggested to use effective software. PST to MBOX Converter is the reliable software to restore Outlook backup PST in Thunderbird MBOX format. The tool allows you to import PST files to MBOX format supported by Thunderbird by unified conversion of PST files to MBOX format.

Steps to Restore Outlook Backup PST in Thunderbird

Following are the complete working of PST to MBOX to import PST files into MBOX format for Thunderbird along with attachments:

Step 1. First of all, download the software PST to MBOX on your Windows machine.

Step 2. Launch the tool on your desktop, and then click on the Add Files/Add Folder option to add Outlook backup PST files to import into MBOX format.

Step 3. After adding PST files, you can view every selected Outlook email in the preview window and after that click on the Export to continue with the process.

Step 4. Now choose the Output format as MBOX from the available output options. Then, choose a destination path by using the Browse option.

Step 5. Now, click on the Convert to start the conversion from PST to MBOX. You can see live conversion progress during the process.

Step 6. Once the conversion process is finished, then the software will display the success message i.e. Conversion Done Successfully. Then, hit on the OK to accomplish the procedure.

Note: When the process is finished, you can check the exported MBOX file navigating to the identified location. In the last, you have to move the MBOX file to Thunderbird email application to view emails. But, there are numerous ways of moving an MBOX file in Thunderbird running on the different Windows machines.

Windows XP

For Windows XP, you have to copy the exported file to the given directory path:

C:\Documents and Settings\Administrator\Application Data\Thunderbird\Profiles

Windows Vista

For Windows Vista, you need to copy the transferred file to the given directory path:


Windows 7/Windows 8/Windows 10

You need to copy the converted file to the provided directory path for Windows 7/8/10:


When it’s done, launch the Mozilla Thunderbird. You can view the exported emails in the left pane under the ‘Local Folders’.

Try PST to MBOX for Free

For the user’s evaluation, the PST to MBOX Converter software is also available with the FREE Trial edition, which is capable to restore Outlook backup PST in Thunderbird MBOX file with a few limitations. The Free Trial version of the tool has the efficiency to work in the same direction as well as the license version. According to me, it is the best solution if you are looking for a conversion of Outlook emails into MBOX format. This tool creates MBOX files that are supportable for all supported email clients including Thunderbird, Apple Mail, Eudora, Entourage, SeaMonkey, PocoMail, Opera Mail, etc. without any problem. After using the free edition of this tool, you can go with the licensed version that is able to restore Outlook PST in Thunderbird MBOX file in a bulk mode at once having no one error.