How to Convert PST to MBOX File Format With or Without Outlook?

adamsmith31

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Feb 4, 2025
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If you are looking for solution to convert PST file to MBOX then I would recommend to use EmailsGuru PST to MBOX Converter. It allow users to convert PST database into MBOX format, maintaining the original folder structure and preserves the email metadata during the conversion. The converted MBOX file data can be easily accessible to all major email clients like Mozilla Thunderbird, Yahoo Mail, Opera Mail, Apple Mail and many others. It is capable to convert PST to MBOX file format with or without Outlook. It also offers a free trial version to users.
 

jackera

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Feb 13, 2025
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Converting PST files to MBOX format becomes essential when switching from Microsoft Outlook to email clients like Thunderbird, Apple Mail, or others that support MBOX. If you have Outlook installed, the process becomes easier, as you can access and export the data more directly. With Outlook, you can manually export emails to a format that can be further converted to MBOX using third-party tools. For example, you can extract emails in EML format from Outlook and then convert those EML files into MBOX using free utilities or reliable software solutions.

However, if Outlook is not installed or accessible, converting PST to MBOX requires a different approach. In this case, automated tools like Advik PST to MBOX Converter come in handy. These tools allow you to directly convert PST files—even without Outlook—into MBOX format while maintaining the folder hierarchy, email properties, and attachments. This is particularly useful for users who have orphaned PST files or are migrating to MBOX-supported platforms. Whether you have Outlook or not, both scenarios can be handled efficiently using the right conversion method.
 
Jul 30, 2025
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To convert PST to MBOX file format with or without Outlook, you can use a manual method or a professional PST Converter, depending on your situation.
If you have Outlook installed, you can first open the PST file in Outlook using File > Open & Export > Open Outlook Data File. Then set up an IMAP account in Outlook and move the emails from the PST into that IMAP mailbox. Once everything syncs, open the same account in Thunderbird and export the synced mailbox as an MBOX file. This manual route works but can be long and complicated, especially for large files.

If you want a simpler, faster option without Outlook, a dedicated PST Converter is a much better choice. Install the software, add your PST file, preview the mailbox, select MBOX as the output format, and start the conversion. The tool preserves all email content, attachments, folder structure, and metadata.
For detailed step-by-step instructions and more tips, refer to the blog.
 

rishi

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Jan 5, 2026
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To convert PST to MBOX easily, the DRS PST Converter Tool is the most effective solution because it works independently, meaning you don't even need Microsoft Outlook installed on your computer. This software essentially acts as a bridge, reading the complex PST data and rewriting it into the MBOX format used by apps like Thunderbird and Apple Mail while keeping your attachments and folder names exactly as they were. While you can technically do this manually by syncing emails through a Gmail account, the DRS tool is much faster and safer for large files