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MBOX file extension

The table below provides useful information about the .mbox file extension. It answers questions such as:

  • What is the .mbox file?
  • What program do I need to open a .mbox file?
  • How can the .mbox file be opened, edited or printed?
  • How can I convert .mbox files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Unix Mailbox

Unix Mailbox .mbox file icon
MBOX file is a Unix Mailbox file. MBOX is a generic term for a family of related file formats used for holding collections of electronic mail messages. All messages in an mbox mailbox are concatenated and stored as plain text in a single file. In mboxes a new mail always begins with a "From " line, commonly referred to as From_-line.
Category: Data files
Application: Mozilla Thunderbird
Mime-type: application/mbox
Magic number: -
Magic string: -
Sample: -
MBOX aliases:
MBOX related links:
MBOX related extensions:
Microsoft Outlook Personal Folder File

Microsoft Outlook Express E-Mail

Eudora Mailbox File

Microsoft Outlook Express Folder Database

Microsoft Outlook 2000 Auto Complete Nick List

Microsoft Outlook 2002 Auto Complete Nick List

Microsoft Outlook Send/Receive Settings

Transport Neutral Encapsulation Format

Microsoft Outlook Extension Configuration File

Microsoft Office Outlook Saved Search

Other types of files may also use the .mbox file extension.

🚫 The .mbox file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

box, mbo, mbx, mox

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

CARA Loudspeaker Design
MapBasic Program
Kodicom Video Metadata
ExtendSim Simulation Model
VTrain Box Data
MapBasic Compiled Object
Eudora Mailbox File
Microsoft Outlook Express v4 Mailbox

🔴 Can't open a .mbox file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .mbox file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .mbox file extension, write to us!

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