How to Convert MBOX to EML Easily?

Mozilla Thunderbird, Apple Mail, Entourage, and Eudora are various email client applications that employ MBOX format files to store and manage mailbox data.

On the other hand, EML files stand for electronic mail, that contains text messages. Microsoft Outlook Express uses EML format to save text emails.

While transitioning between email clients, individuals often require their mailbox data to be available in various email formats, such as EML and MSG. Converting MBOX to EML facilitates access to mailbox data through Windows Live Mail, Microsoft Outlook Express, and various other email clients.

In this article, we’ll guide you with a step-by-step process of the manual method along with an automated MBOX to PST Converter tool for MBOX to EML conversion.

Why to convert MBOX to EML?

EML files provide additional benefits that encourage its users to convert their MBOX files into EML. Some of them are mentioned below.

  • EML stores emails in separate files, whereas MBOX stores emails in a single file.
  • It allows users to share a specific portion of mail data.
  • Various email clients support EML files as compared to MBOX files.
  • It can be easily accessible in browsers or text editors.
  • EML files are less risky as compared to MBOX files.
  • It occupies less space due to its selective extraction of emails.

Now, we are going to discuss manual and automated methods for MBOX to EML conversion. Use them one by one to find the most suitable one for you.

Method 1- Using Thunderbird email client

Follow the given method carefully to convert your MBOX files to EML format.

Part 1: Import MBOX files into Thunderbird

Users need to install an ImportExportToolsNG add-on in their Thunderbird application. After the installation of the mentioned add-on, go through the following steps to import MBOX files in Thunderbird application.

  1. Open Thunderbird, right-click on Local Folders> select ImportExportToolsNG> choose Import mbox Files.
  2. Click on Import directly one or more MBOX files, then proceed with OK.
  3. Browse to choose your desired location then Open it.

Part 2: Export MBOX files in EML formats

After the successful import of your MBOX files, follow the given steps to convert them into EML format.

  1. Access the mailbox folder where you imported your MBOX files.
  2. Right on that folder, click on ImportExportToolsNG option> choose Export All Messages In Folder Option> select EML Message Format.
  3. Browse to select your desired location, then proceed with Select Folder option.
  4. Now, MBOX files are successfully saved in EML format.

Limitations of manual methods

  • Improper use of manual methods can cause data loss.
  • Changes in the original structure or hierarchy can occur.
  • Users need technical knowledge to implement this method.
  • Multiple conversions aren't possible at the same time.
  • Users can't apply filters to remove unwanted data during conversion.

Method 2: Using a professional tool for MBOX to EML conversion

Using Kernel for MBOX to PST tool, you can easily avoid the limitations of the manual method. Also, it allows users to apply filters based on their needs to remove unnecessary data from the mailbox. Furthermore, it offers several advanced features, including:

  • It supports over 20 email clients, including Apple Mail, Thunderbird, PocoMail, PowerMail, Entourage, etc.
  • This tool provides a live preview option to view all your converted MBOX files.
  • It maintains the original structure and hierarchy of the converted file.
  • The tool allows you to add and convert single or multiple MBOX files simultaneously.
  • It converts MBOX files to PST, MSG, EML, PDF, TXT, DBX, RTF, HTML, or MHTML file formats.

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Follow the steps to convert MBOX files to EML

Follow the mentioned steps to convert your MBOX files to EML using an automated tool.

Note: You have the flexibility to choose either a single MBOX file or multiple files simultaneously, depending on your requirements.

  1. Launch the application, tap on Browse to choose MBOX file then proceed to Finish. Launch MBOX to PST converter tool
  2. Preview your mailbox items from the top left section. Preview of MBOX file
  3. Click on Save option then under the select output option select EML file and hit Next. Select EML file format as a destination
  4. Apply filters according to your needs under the filter section.

    If not needed, then proceed with Next to skip this step.

    Apply filter options
  5. Select a destination to save the MBOX file as an EML file, then tap on Finish. Provide a location to save EML file
  6. After finishing the conversion process, you are ready to utilize the newly converted EML file. Click "OK" or access the file folder location by selecting the provided active link. Convert MBOX to EML process done


Converting MBOX to EML files manually can be a challenging task for users because of technical expertise and its time-consuming nature. Moreover, it doesn't even guarantee you an error-free conversion. In that case, using the Kernel for MBOX to PST tool is an ideal solution. It provides a smooth, reliable conversion from MBOX to EML, and a customizable solution tailored to user needs.

Download software

  1. I needed some emails from Apple Mail in Outlook and the Apple account was not working; then I used your software and converted the emails in EML format that was accessible in Outlook.

  1. The tool has advanced filters that I could apply for selective MBOX to EML conversion.

  1. Now I can easily upload my Thunderbird MBOX file to Windows Live Mail. The software is the most advanced I've ever worked with. Its graphic interface and its functions are very useful. The filtration option makes it more valuable.

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