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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


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Do you have errors with .MBX files?

What Causes .MBX files Errors to Occur?

A common and likely explanation for .MBX files errors is corruption in the Windows registry - repairs are necessary to avoid further damage in other applications and/or devices. Receiving these errors puts your computer in danger for fatal crashes, blue screen errors and even device failure.

What are the Symptoms of .MBX files Errors?

Common symptoms with .MBX files errors include slower computer performance, excessive application start up speed, trouble opening files, excessive suspensions in program procedures, software exits without giving an indication of error, screen freezing and applications crash.

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Repair .MBX File Errors    |    How to Fix .MBX File Extension Errors    |    What is the .MBX File Extension?