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Convert MSG to MBOX

Convert MSG to MBOX
Converts Outlook MSG message files to MBOX format. It is possible to retain the original folder structure.
Version: 4.21 released on August 22, 2022.
(4.7 / 128 reviews)

Convert MSG to MBOX for Outlook
"Convert MSG to MBOX" has an advanced version

This utility converts email messages from Outlook MSG files to MBOX format compatible with many other email programs and systems. Most email clients can import messages from MBOX files but do not work with MSG files used only by Microsoft Outlook.

The MSG file format is used to save messages, calendar events, contacts, tasks, notes, journal entries, and other Outlook items. Each MSG file contains all the data for one Outlook item, including attachments.

The MBOX file format is used to store, import, and export email in popular email clients for Windows, macOS, Linux, and Unix: Mozilla Thunderbird, Apple Mail, Eudora, Opera, PowerMail, and others. Some cloud services like Gmail use the MBOX format to upload messages.

Why convert MSG to MBOX?

  1. MSG is a native Outlook format. No other email client works with it. To copy messages from Outlook MSG to another email client, you have to convert them to a format that the accepting program can use.
  2. Many email apps support the MBOX format, but you cannot get it directly from Outlook, so our MSG2MBOX converter comes in handy for you.

Why can't you use an online MSG to MBOX converter?

MSG files contain your important confidential data. When you use an online service to convert mail from MSG to MBOX, all this data is transferred to an external server. The data is processed on a third-party computer, and you have no control over the process. Only after it may you download your email in MBOX format. Besides, uploading many MSG files to the online service takes a long time or is impossible

In opposite to online converters, our utility works strictly on your local computer. Information from the converted files is not transferred anywhere. When using this utility, your data will not fall into the wrong hands.

How to convert MSG to MBOX?

  1. Select the folder with the source .msg files;
  2. Specify destination folder for .mbox files;
  3. Run the utility; all further work is done automatically.

Can I customize MBOX file names when converting from MSG?

The short answer is Yes!

If you only specify a folder for the resulting MBOX files, all messages are saved to this folder. Each .mbox file contains messages from a separate folder with MSG files.

Additionally, the utility allows you to flexibly customize the names of the resulting folders and MBOX files. To do this, use macros in the target path: message subject, sender or recipient names and domains, send and receive dates, current date and time, Windows environment variables, and many other values. /p>

Regular expressions are available for advanced users. They can extract only the desired fragments of the subject, message body, and other fields of Outlook email messages for the target folder name and saved files.

Are there any limitations when converting MSG to MBOX?

There are no limits on the number and size of files to be converted and received. You can convert an unlimited number of folders or files and do so as often as you like.

Since MBOX is a format for storing email messages only, contacts, calendars, and other Outlook items will not be stored in it.

When converting, the utility saves all available data, such as:

  • message subject,
  • send and receive dates,
  • sender and recipient addresses,
  • attachments,
  • message text with HTML markup and pictures,
  • message flags and stars,
  • read/unread, and replied/forwarded statuses,
  • Internet headers.

How to convert mail from MSG to MBOX massively?

The command-line application in the Professional Edition of the product enables you to convert many files from MSG to MBOX using scripts, batches, PowerShell, and other automation tools. The command-line app is a useful tool for complex email migration uses.

If you run several command-line applications at once, the automatic conversion of many .msg files to .mbox becomes much faster due to the parallel execution.

To schedule email conversion from MSG to MBOX, use the command line app and the standard Windows Task Scheduler. The scheduler allows you to flexibly configure the schedule parameters and run the utility without manually logging into a user account.

By converting email from Outlook MSG message files to MBOX message databases, you get separate .mbox files for each folder with .msg files according to the original structure. You can later load them into other email programs such as Thunderbird or Apple Mail.


How to open .MSG files on Mac?

Unfortunately, you cannot open Outlook MSG files on Mac by standard means. When you try to open an MSG file in Apple Mail or Outlook for Mac, you get a new email message where this MSG file is added as an attachment you cannot view.

Trying to open .msg file on Mac

Converting messages from MSG to MBOX is often the only way to open MSG on Mac.

After conversion, you can load messages from MBOX to Apple Mail using standard import tools. Use File > Import Mailboxes in Apple Mail to import messages from MBOX.

Import MBOX on Mac

How to open MSG files without Outlook?

Files in MSG format can be opened in Outlook. To open MSG files in other programs, you need to convert them to another format. After converting MSG files to MBOX format, you can load messages to third-party email clients such as Apple Mail or Thunderbird.

OutlookFreeware.com Outlook Ribbon
All utilities easily integrate with Outlook (optionally)

* This utility is for non-commercial home use only. It will not run in domain enviroment. Some of the described features and support for domain enviroment are available in advanced version of the utility only. Free version may have additional limitations.

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