BOX File

What are BOX files and how to open them

Are you having problems opening a BOX file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a BOX file?

BOX files have multiple uses, and Email Message is one of them. Read more about the other uses further down the page.

Email Message

Files that contain the .box file extension are most commonly used to store email messages. A variety of email applications use the .box file extension to store collections of email messages. These email messages can be opened individually by opening the contents of the BOX file.

The .mbox and .dbx file extensions have been replacing the BOX file format over time. Popular email programs that use the .box file extension include the Lotus Notes Mailbox, FoxMail, and Calypso email applications.

How to open BOX files

Important: Different programs may use files with the BOX file extension for different purposes, so unless you are sure which format your BOX file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested ten different BOX openers which you will find listed below.

Last updated: January 13, 2023

More file formats using the BOX extension

Through our research of BOX files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • Boom Box Project
  • Microsoft Store Download Package

Various apps that use files with this extension

These apps are known to open certain types of BOX files. Remember, different programs may use BOX files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Harmony Assistant - Win32Harmony Assistant - Win32User submitted
MediaShoutMediaShoutUser submitted
TemplotTemplotUser submitted
MYOB Accounting PlusMYOB Accounting PlusUser submitted
OVSViewerOVSViewerUser submitted
Dragon UnPACKerDragon UnPACKerUser submitted
RuppLynx Browse ModeRuppLynx Browse ModeUser submitted
MYOB AccountRight PlusMYOB AccountRight PlusUser submitted submitted
MYOB AccountRight PremierMYOB AccountRight PremierUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about BOX file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.