In this blog, we have explained an automated method to easily and efficiently convert OST to MBOX format using an OST to MBOX Converter. We will describe the reasons for conversion and provide a complete step-by-step guide.
Overview—
As we all know many business organisations are using MS Outlook for their email communication and personal information management. Outlook allows users to store their data in two file formats OST & PST.
When Outlook connects to the Exchange Server or IMAP, it creates an OST file. An OST file is an offline file that contains data items such as emails, contacts, calendars, tasks, notes, etc. It works offline and syncs with the Exchange Server when Outlook connects to the Internet.Â
MBOX file is operable in operating systems like Windows, Linux or Mac by installing the Mozilla Thunderbird email client. Some programs that support MBOX files are Thunderbird, Sea Monkey, Apple Mail, Spice Bird, Eudora and so on.
As we compare both the MBOX and OST files, the MBOX file is better than the OST file because when the OST file becomes orphaned and cannot be opened in Outlook on any version. An MBOX file can be opened in any email client supporting it.
Reasons for OST to MBOX Conversion
- OST files are more prone to corruption.
- OST files are only opened in the Outlook email client and MBOX files are opened in many email clients like Thunderbird, Sea Monkey, Apple Mail, Spice Bird, etc.
- OST files do not directly open in Outlook, they open only after OST to PST Conversion.
Also Read: Best way to convert OST files to EML format
Best and Automated Method to Convert OST File to MBOX Format
The best and most automated method to convert OST File to MBOX Format is the eSoftTools OST to MBOX Converter software. With a few clicks, you can convert OST File to MBOX format with this tool. You can convert OST to MBOX format without the installation of Outlook installed on your system. There is no need for any third-party application to convert OST to MBOX.
Best and Attractive features of the software
- Easily converts inaccessible, orphans and encrypted OSTÂ to MBOX files.
- Converts multiple OST files to MBOX format at a time.
- Provides the option of converting an OST file to a single MBOX file.
- Provides the preview of all the files/folders of the mailbox in the OST file in the preview panel.
- Allows to convert OST files to MBOX and other file formats such as EML, EMLX, HTML, MSG, TGZ, PST, etc.
- Capable of migrating OST files to other cloud-based applications like Microsoft 365 (Office 365), Outlook.com, Gmail, Yahoo Mail, and IMAP applications.
- Supports OST files of all editions of MS Outlook 2021, 2019, 2016, 2013, 2010, 2007, and below editions.
- Compatible to work with all editions of Windows Operating System like Windows 11, 10, 8.1, 8, 7Â & below versions.
Step-by-step approach to Convert OST File to MBOX Format
- Download and install eSoftTools OST to MBOX Converter software in your system.
- Click on the Select OST button on the above menu bar to add OST files to the software.
- Click on the Select file button to add OST, PST and NST Outlook files into the software and click on Start scanning process.

- Preview the loaded files and folders of the OST, PST and NST files in the preview panel and select the files and folders to be converted into MBOX files.

- Click on the Save OST button and a new window will appear on the screen.
- Choose the Export to MBOX option from the list of options seen on the screen by clicking on the radio button.
- Apply Mail filtering ( To filter emails according to Date Range (From and To)) and the Naming convention (Save emails with unique names based on Subject, Date, and From) feature if you want to apply.
- Browse the location where you want to save the resultant MBOX file.

- Click on the Convert button to start the conversion process from OST to MBOX files.
Conclusion
In this blog, we have explained the best and most reliable automated method to convert an OST File to MBOX Format. You can easily convert OST files to other file formats and migrate OST files to cloud-based applications. In the demo version, you can convert 25 files from each OST file folder to convert and migrate, and if you like it you can purchase the software.
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