Scan for .MBX File Extension Errors    |    What is the .MBX File Extension?    |    Repair .MBX File Errors

Run a Free Scan to check for MBX related errors.

What is the .MBX File Extension?

.MBX File Extension Description:

The file extension MBX is an electronic messaging index file created by Microsoft to work with Windows' built-in e-mail service, Microsoft Outlook Express. The said e-mail program is an easy and straightforward program that allows users to send and receive e-mail messages with one click and through simple data form templates in the Windows environment. These e-mail information listings for both received and sent messages, as well as the spam, junk, and custom lists, are stored in an .mbx file extension. The .mbx file extension serves as the database listing for the organized generation of e-mail archives when the user logs on to Microsoft Outlook Express.

The MBX file format's structure is simply generated as a straight-level file system generation. This means that the list for the archived messages is stored in the same directory with the list it is generating its information from. Microsoft Outlook Express accesses the files with the .mbx extension upon execution and gathers the list of archived data.

This MBX file type extension is also used by other electronic messaging systems, like Eudoramail. The difference in the management of offline and online messaging services is the access of the .mbx file type. Offline messaging services, like Outlook Express, store the .mbx file in the client's computer, while online service providers keep their own lists of .mbx files of all subscribers in their respective servers.

Due to the lists' straightforward design, creating a duplicate .mbx file may back up the file and archive generation of lists of emails in the client's Outlook Express folder. This is a good method to prevent permanent loss and damage to archived email.

Author: Microsoft Corporation
Author URL:
Related Applications: Microsoft Outlook Express
Common Path: N/A


Run a Free Scan to check for MBX related errors & to optimize PC performance.

Do you have errors with .MBX files?

The Typical Cause of .MBX files Errors:

.MBX files errors are possibly serious Windows registry errors and many times are caused because of a faulty program registry that needs to be fixed at once to prevent further failure in other software and/or hardware. Risks include device failure, blue screen errors and fatal program crashes.

What are the Symptoms of .MBX files Errors?

Common symptoms from .MBX files errors include slower pc performance, extended software load speed, problems opening files, excessive breaks in software routines, programs shuts down without showing an error message, input freezes and applications lock up.

Helpful Tools

The following products are free to try. We have found them to be of the highest quality and value. They have been extremely useful in our own pc troubleshooting and maintainance and we highly recommend trying them out for yourself.

Anti-Malware Pro

With a lightning fast free scan and the largest authentic spyware detection database we have seen, Anti-Malware Pro finds and removes threats to your PC stability and security. Download Anti-Malware Pro


DriverFinder will scan your system for driver and software updates. Its easy to use interface makes keeping your drivers updated quick and simple. They will even send you an email notification when new driver updates are available for your system! It doesn't get any more convenient than this. Download DriverFinder

Browse File Extensions by Name:

Is your File Extension missing?

Help us to make the best resource we possibly can by submitting you very own file extension details. If you have detailed information on any file extensions please let us know by visiting the following link.

Submit File Details Form

How to Fix .MBX File Extension Errors    |    Scan for .MBX File Extension Errors    |    Repair .MBX File Errors