Converting MBOX files to PST
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There are times when users need to convert MBOX files to PST format, such as when switching email clients or transferring data. In this article, we will discuss free methods on how to convert MBOX to PST file format manually. With these methods, users can easily convert their MBOX files to PST format and avoid the risk of data loss or corruption.

Quick Glance at MBOX and PST File Formats 

MBOX and PST are two popular email file formats that are used to store email messages. 

MBOX is a file format used for storing email messages on a Unix-based operating system. While MBOX is a standard file format used by various email clients, PST is a proprietary file format used by Microsoft Outlook. It stores multiple email messages in a single text file, and each message is separated by a delimiter. MBOX files can be accessed and read by several email clients, including Thunderbird, Apple Mail, and Eudora.

On the other hand, PST (Personal Storage Table) is a file format used for storing email messages on a Windows-based operating system. It stores email messages, calendar items, and other data in a single file. PST files can be accessed and read by Microsoft Outlook.

Both MBOX and PST files have their unique features and advantages. MBOX files are compatible with multiple email clients, making them versatile and flexible. They also take up less disk space compared to PST files. PST files, on the other hand, are known for their robust data security features and can handle a vast amount of data.

Reasons Why Users might Need to Convert MBOX files to PST File Format

  • Users need to switch to Microsoft Outlook, which only supports the PST format.
  • Migrating email data to a system that requires the use of PST files.
  • Taking advantage of features such as password protection and archiving, which are available in PST files but not in MBOX files.
  • Allowing for easier searching and sorting of email data within Microsoft Outlook.
  • PST files are better suited for large email accounts with a high volume of messages, as they offer better performance and scalability.
  • Organizations may require employees to use Microsoft Outlook for email communication, making it necessary to convert MBOX files to PST format.
  • Complying with legal and regulatory requirements for email retention and archiving.
  • PST files offer greater control over email data, such as the ability to delete messages permanently, which may be necessary for some users.
  • PST files can be backed up and restored more easily than MBOX files, making them a better choice for disaster recovery purposes.
  • Converting MBOX files to PST format allows users to access their email data on a wider range of devices and platforms, as Microsoft Outlook is available on multiple operating systems.

Also Read: Efficiently Export Zimbra Mailbox to PST with Simple Step By Step Guide

Different Free Ways to Convert MBOX Files to PST Step By Step

When it comes to converting files between MBOX and PST, there are several methods available. Let’s discuss it in a detailed way. 

Method 1: Convert MBOX to PST Using Several Email Clients

Step 1. Begin by importing mailbox data into Apple Mail.

  • Step 1.1. To import MBOX files into Apple Mail, follow these steps:
  • Step 1.2. First, open Apple Mail on your PC.
  • Step 1.3. Go to the File menu and select the Import Mailboxes option.
  • Step 1.4. Select the MBOX file (source) that you want to import and click Continue.
  • Step 1.5. In the Import dialog box, select the MBOX files you want to import and click Continue.
  • Step 1.6. Once the import process is completed, click the Done button to finish.

Step 2. Create a new mailbox using Eudora.

  • Step 2.1. Add the .mbox file extension to the imported file.
  • Step 2.2. Move the file to the Eudora directory. The default location is: C:
  • Step 2.3. Documents and Settings user >> Application Data\Qualcomm\Eudora.
  • Step 2.4. Open Eudora and double-click on the .mbx file to import it.
  • Step 2.5. Once the import is complete, close the Eudora application.

Step 3. Import the newly created mailbox using Outlook Express.

  • Step 3.1. Launch Outlook Express on your computer.
  • Step 3.2. From the File menu, select Import and then click on Messages.
  • Step 3.3. Choose Eudora from the list of email applications and click Next.
  • Step 3.4. Browse to the location where the MBOX file is saved and click Ok.
  • Step 3.5. Click Next, then Next again, and finally, click on Finish to complete the process.
  • Step 3.6. After the import process is complete, you will find the imported data saved in the Outlook Express Local Folders.

Step 4. Move the mailbox from Outlook Express to Microsoft Outlook.

  • Step 4.1. Launch MS Outlook on your system.
  • Step 4.2. Click on File, then select Open & Export and click on Import/Export option.
  • Step 4.3. Choose the option “Import from another program or files” and click Next.
  • Step 4.4. Select “Import Internet Mail and Addresses” and click Next.
  • Step 4.5. Choose “Outlook Express 4.x, 5.x, 6.x, or Windows Mail” and click Next.
  • Step 4.6. Browse and select the file to import and click Next.
  • Step 4.7. Finally, click Finish to complete the process.

Method 2: Convert MBOX to PST Using Thunderbird & Outlook

Step 1. Save Thunderbird MBOX emails in EML files.

  • Step 1.1. Open the Thunderbird email client and right-click on the folder. Select the New Folder option.
  • Step 1.2. Name the folder and click on Create Folder.
  • Step 1.3. Choose the emails you want to convert and move them to the new folder.
  • Step 1.4. Select all the emails in the folder and click on Save As. The emails will be saved in EML format in a specific location.
  • Step 1.5. Navigate to the folder where the EML files are saved.
  • Step 1.6. Drag and drop the EML files into the Microsoft Outlook application.

Step 2. Convert the MBOX (EML files) to PST format.

  • Step 2.1. Open MS Outlook on your system and go to File>>Open & Export>>Import/Export option.
  • Step 2.2. In the Import/Export wizard window, select Export to a file and click Next.
  • Step 2.3. Choose Outlook Data File (.pst) and click Next.
  • Step 2.4. Browse to the folder containing the EML files and click Next.
  • Step 2.5. Choose a location to save the new PST file and select the desired option from the list.
  • Step 2.6. Click on the Finish button to complete the process.
  • Step 2.7. The EML files will now be converted into PST files and can be accessed in MS Outlook.

Also Read: How to Convert MBOX to PDF with Attachments – The Ultimate Guide to Follow

Limitations of Manual Method in Converting MBOX File to PST

  • Time-consuming: The manual process of converting MBOX files to PST is a time-consuming process as it involves multiple steps.
  • Technical expertise: The manual conversion process requires technical expertise, and even a small mistake can lead to data loss.
  • File size limitation: The manual method may not be suitable for large MBOX files, as some email clients may have limitations on the file size that can be imported.
  • Risk of data loss: During the conversion process, there is a risk of data loss or corruption, and there may not be any backup available to restore the data.
  • Compatibility issues: The manual process may not be compatible with all email clients, and there may be issues with the conversion process due to compatibility problems.
  • Lack of features: The manual process may lack some features such as filtering options, batch conversion, and the ability to handle complex folder structures.
  • Tedious process: The process of installing and using multiple email clients can be tedious and time-consuming.
  • Requires specific software: The manual method requires specific email clients to be installed, which may not be available or compatible with all systems.
  • No automation: The manual process lacks automation, which means that each step must be done manually, leading to potential errors or inconsistencies.
  • Limited support: The manual process may not be well-supported by the email clients, leading to potential issues or errors.

Method 3: Convert MBOX File to PST Using Alternate Solution.

When it comes to accessing MBOX files in Outlook 2021, 2019, 2016, 2013, 2010, 2007, and older versions without risking data loss, SysTools MBOX Converter is an ideal solution. The software can identify email applications that support MBOX files, making it compatible with various clients, including Apple Mail, Entourage, Thunderbird, Mutt Mail, and more.

Quick Software Steps to Convert MBOX File to PST

The application is an independent software tool that can quickly convert MBOX to PST files with just a few clicks. Here are the steps to follow:

Step 1. Launch MBOX Converter and click “Add File.”


Step 2. Select the MBOX file(s) you want to convert.


Step 3. Preview all the MBOX emails in the software.


Step 4. Select “PST” format.


Step 5. Click “Export” to convert MBOX files to PST for free if using the demo version.


This software tool can merge multiple MBOX files into a single PST file, create separate PST files for individual MBOX files, and split PST files, among other features. A free trial version is available that allows users to convert up to 25 emails per folder from MBOX files. If satisfied, users can opt for the full version to continue using the tool.

Users can either use a third-party software solution or convert files manually. Manual methods require more technical knowledge, but they are free and readily available online.

Also Read: How to Extract Attachments from EML Files – Issues and Free Solutions

Here are some benefits of using software to convert MBOX files to PST:

  • User-friendly Interface: The software comes with a user-friendly interface, making it easier for users to convert their MBOX files to PST format without any hassle.
  • Time-saving: Using software to convert MBOX files to PST format is a time-saving process as it automates the conversion process, eliminating the need for multiple manual steps.
  • Data Security: With software, the risk of data loss or corruption is reduced as it ensures the data integrity and security during the conversion process.
  • Multiple File Formats: The software supports multiple file formats and can convert MBOX files to various other formats such as EML, MSG, HTML, and PDF.
  • Large File Size: The software can handle large MBOX files, which is not possible with manual methods due to limitations in email clients.
  • Batch Conversion: The software allows for batch conversion, which means you can convert multiple MBOX files to PST format at once, saving time and effort.
  • Additional Features: Software comes with additional features such as filtering options, selective conversion, and the ability to preview and save the converted data in a desired location.


Converting MBOX files to PST is essential for accessing your email data in Outlook. While manual methods can be time-consuming, complex, and carry a risk of data loss, using specialized software can provide numerous benefits such as ease of use, fast and efficient conversion, ability to handle large files, and advanced features. It is recommended to choose a reliable and trustworthy software tool that can ensure the safety and integrity of your data during the conversion process. With the right tool, converting MBOX files to PST can be a smooth and hassle-free experience, allowing you to access your email data in the most convenient way.

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