What is a .MBX File And How To Open It – Microsoft (Guide)


While downloading files, you might have downloaded a file with the .mbx extension. Perhaps you know what the file is, but you simply don’t know how to open it. Thanks to this easy guide you will be able to find out what .mbx file extension is, how to open it and how to work with it.

What is a .MBX file?

The .MBX file extension comes from Outlook Express Mailbox. The development of this file was done by Microsoft. The file is a data related file.

What to know

There are currently 2 software that can open the .mbx file on 1 platform.

How to open a .MBX file?

Below you can find an easy to understand, step-by-step guide to open the .MBX file on your operating system/device.

How to open a .MBX file on Windows (7, 8, 10)

The .mbx file can be opened in 4 steps on Windows.

1. In the first step you need to download the Aryson MBOX Viewer software. This software will be used for opening the file. Other software that can be used in opening this file is: Microsoft Outlook Express and Aryson MBOX Viewer.

Step 2

Step 2: Locating your .MBX file

2. The second step is locating the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Aryson MBOX Viewer software you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .MBX file?

If you are still unable to open the .MBX file, it might be because you are trying to open the wrong one. There are many similar file extensions that look like the .MBX file.mbz – Moodle, .mc – Alexander Teplukhin, .mc1 – MedCalc, .mc2 – ValuSoft, .mc5 – Bondware. You might be trying to open one of them. Please recheck the file extension again.


In this article you have learned how to open the .MBX file with the Aryson MBOX Viewer, Microsoft Outlook Express programs on Windows.