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Written By Kiran Sharma
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Updated on June 26th, 2025
This is a common situation many users face when shifting from Microsoft Outlook to an MBOX-supported email client like Mozilla Thunderbird, Apple Mail, or Eudora. So, if you’ve switched systems or email platforms, all you need transfer OST to MBOX to gain access to your old emails. But here’s the challenge: Outlook doesn’t provide a direct way to export OST to MBOX. That’s why in this blog, we’ll cover the best manual and automated methods to convert OST File to MBOX. We’ll also introduce you to the OST to PST Converter Tool, a reliable utility that simplifies this process and ensures 100% secure migration.
OST (Offline Storage Table) files are tied to specific Outlook profiles and Exchange accounts, which means they’re inaccessible once disconnected.
On the other hand, MBOX is a flexible format supported by a wide range of email applications across different platforms.
Here are the main benefits, especially if you’re no longer using Microsoft Outlook:
Now, you know how the conversion process can be helpful for you while you are switching email platforms.
Although there’s no built-in option in Outlook to convert OST to MBOX directly, you can follow this two-step process:
Once you have the PST file, convert PST to MBOX to get the OST data.
Important Note: This method is long and may not work if your OST file is orphaned or corrupt.
Another most common indirect method is to convert your OST file to MBOX, using Mozilla Thunderbird. It involves Thunderbird with the ImportExportTools NG add-on to save the data as MBOX.
You’ve now successfully converted your OST data to MBOX for free using Thunderbird.
Manual ways to change OST to MBOX may look easy and free, but they have many limitations. Here are some important things to know before you try this method:
Because of these cons pointers, most users prefer an automated tool for a direct OST to MBOX conversion.
When dealing with critical email data, it’s best to rely on a trusted and tested solution. In such cases, use MigrateEmails OST to PST Converter to simplify the conversion process. There is no need of Outlook or any complex manual steps to change OST to MBOX. As a result, you can perform direct and secure conversions in just a few clicks. Along with that, you can convert OST to HTML and other formats.
This step-by-step guide will show you how to perform a conversion using this reliable tool:
In this complete blog, we explored both manual and automated ways to convert OST to MBOX. While the manual process works in limited cases, using a professional tool is a quick and more reliable option for smooth and secure conversion. So, if you want a smooth, error-free OST to MBOX conversion, use the above-mentioned trusted utility to accomplish the task.
Ans: People convert OST files to MBOX so they can open their Outlook emails in other email apps like Thunderbird, Apple Mail, or Eudora. OST files only work with Outlook and Exchange, but MBOX files work on many platforms. Converting OST to MBOX also helps when the OST file is damaged or can’t be opened. Also, it becomes easy to save and share OST data.
Ans: One of the best tools to convert OST to MBOX is the MigrateEmails OST to PST Converter. It allows direct conversion without Outlook. Moreover, it supports bulk file export and preserves email formatting. The user-friendly interface makes it suitable for both technical and non-technical users.
About The Author:
I am Kiran Sharma, a Technical Expert in Content writing. I have technical expertise in the field of Email Backup, Data Recovery, and Email Migration, and resolve technical queries related to Cloud Backup or Email Migration for individuals and businesses.
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