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Written By Suman Rawat
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Updated on July 1st, 2025
Conversion of MSG files to the MBOX format is a normal occurrence among users who would like to convert MSG to MBOX and use Outlook emails on other platforms like Thunderbird, Apple Mail, or Eudora. While the MSG file format is specific to Outlook, the MBOX format is quite universal, being supported by multiple email clients across Windows, Mac, and Linux. The conversion helps you to access email on any operating system. To ensure a secure migration, it should be done using reliable methods or a trusted MSG converter to prevent data loss, missing attachments, or corruption of email.
MSG File: Microsoft Outlook uses a file format known as MSG to store individual email messages, attachments, metadata, and formatting information locally. These files can only be accessed via Outlook; consequently, they are restricted to other platforms.
MBOX File: MBOX is a popular format that saves several emails in one file and can be accessed by email clients such as Thunderbird, Apple Mail, and more. By transforming MSG into MBOX, individuals are able to view their messages conveniently on various computer systems.
Outlook MSG to MBOX conversion could be of great value in many aspects. The following are some of the most famous ones:
The reasons above are useful to know why this conversion is a necessity. In addition, MBOX allows optimal storage, convenient backup, and integration of multiple email services and applications.
The users are willing to look at the manual approaches initially. Therefore, this section will explain how to convert MSG emails to MBOX freely. However, the manual procedure can be a bit difficult to perform. Alternatively, professional software offers a simple way of conversion. In the following sections, we have explained them one after another.
This is an easy method that involves using two email clients: Outlook (for opening the MSG files) and Thunderbird (for processing the MBOX). Below is the way you can manually convert your MSG to MBOX using the programs or applications:
This method involves using two email clients: Outlook (for opening the MSG files) and Thunderbird (for exporting to MBOX). Below are the steps that can manually convert your MSG to MBOX using the programs or applications:
Although the manual approach to converting MSG to MBOX is free, it carries its disadvantages:
Note: You can use a professional tool to prevent the drawbacks of manual approaches. It gives fast and precise findings.
The MSG Converter for Mac is a safe and reliable application to convert MSG files, including emails, contacts, attachments, etc., into MBOX. Moreover, this program offers you the most convenient options, including custom folder names, date filters, and deletion of duplicate emails. It removes the complex manual processes and enables one to convert directly within a few minutes.
The software is so powerful that it can also convert MSG into EML, MBOX, PST, PDF, etc. The interface of the tool is simple and user-friendly. It will be very easy to navigate (both in the case of technical users and other users). Moreover, it supports all macOS versions. So, now, we will learn how to convert MSG files.
In short, we discussed two effective ways to convert MSG emails into MBOX on macOS. While the manual approach is free, it has its limitations, especially when dealing with bulk conversions or when maintaining attachments is necessary. Alternatively, the professional approach is fast, straightforward, and effective and guarantees the integrity of the data with the ability to convert several MSG files to MBOX, inclusive of attachments. Depending on the amount of data needed and the level of convenience required, you are able to select the technique of choice.
About The Author:
Suman Rawat is a technical content writer and expert in the fields of email migration, data recovery, and email backup. Her passion for helping people has led her to resolve many user queries related to data conversion and cloud backup.