How to Convert EMLX to MBOX Easily with a Simple Method

Written By Rohan Wiese
Updated on September 18th, 2025

User query: Hello, my name is David from the UK. I have several emails saved in EMLX files that I want to open in my Thunderbird account. So i need to convert EMLX to MBOX and want a method for it without losing important data?

Summary: When users like David find it difficult to migrate to and back from email migration and backup while managing multiple accounts. When you are an Apple Mail user, you might have EMLX files storing your emails. However, when users need to access or migrate these emails to other clients like Thunderbird, they often require the MBOX format. In this guide, we will explain how to convert EMLX to MBOX efficiently with the help of the Aryson EMLX Converter Tool. Additionally, It can make your data stay intact and accessible.

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Table of Contents

What Are EMLX and MBOX Files?

It helps to understand these files before reading the blog post with the conversion:

Firstly, EMLX files are created by Apple Mail on macOS, and every single email is saved in a separate file. While this format works fine within Apple Mail, handling many EMLX files together can be difficult if you need to transfer or back up a large number of messages.
On the other hand, MBOX files are widely used by email clients like Thunderbird, Entourage, and others. Unlike EMLX, MBOX keeps all emails from a folder in a single file, which makes storage, backup, and migration much simpler.

Because of this difference, many users choose to convert EMLX to MBOX when switching to another email platform or when they need an easier way to manage and back up their emails.

Why Convert EMLX to MBOX?

There are several reasons that users might need to perform this conversion:

MBOX can work with many email clients, and EMLX is limited to Apple Mail.
Many EMLX files into a single MBOX file make backup easier.
When moving from Mac to other systems, MBOX ensures all emails and attachments remain organized.

Top Methods to Convert EMLX to MBOX

The manual way through Apple Mail can be lengthy and confusing. A simpler choice is the Aryson EMLX Converter Tool, which quickly converts EMLX files to MBOX while keeping emails, attachments, and folders safe.

Approach 1: Convert EMLX Files into MBOX via Mac Settings

There are not many methods for converting EMLX to MBOX. Using the Mac setting can be time-consuming, but it can do the job.

How to Convert EMLX Files to MBOX? Step-by-Step

First, make sure that Apple Mail is completely closed on your Mac.
Now, type /Library/Mail/Mailboxes in the search bar and press Enter.
Inside the new location, create a new folder with a name.
Next, open a new folder, and inside it, make another folder.
After that, move all your EMLX files into the Message folder.
Once the files are placed, launch the Apple Mail application again and look for the folder you created in Step 3.
From the menu bar, click on Mailbox > Export Mailbox.

Finally, choose the location for the file where you want to save and convert the file by pressing Choose.

Disadvantages to Upload EMLX Files to MBOX file by the manual process

This method can work, but it has a few challenges:

The process is a long process requiring extra effort from users.
A small mistake during the steps can lead to data loss or corruption.
A certain level of technical knowledge, making it difficult for beginners.

Because of these drawbacks, many users look for a simpler and safer alternative.

Approach 2: Easily Convert EMLX to MBOX with Automated Method

The Aryson EMLX Converter Tool is a solution for users who want to convert Apple Mail EMLX files into MBOX format. It allows conversion of EMLX to MBOX format in a few clicks with preserving folder hierarchy and attachments. In addition, this software can provide useful features like the date filter to export only specific emails and to remove duplicate messages before conversion. Additionally, it can directly Convert EMLX Files to PSTalong with many other file formats and email clients.

Simple Steps to Convert EMLX to MBOX file :

First, download the Aryson EMLX Converter Tool on the computer.

After that, click on Add File or Add Folder to load your EMLX files.

Next, preview the uploaded Files by selecting them before the conversion of the files.

From the list of saving options, choose MBOX as the output format.

Apply filters and hit the Convert to Convert EMLX file to MBOX format.

Conclusion

If you are looking to convert EMLX to MBOX, the reason is usually simple. You need a format that works across more email platforms and makes email management easier. The approach mentioned above can be used as the Aryson EMLX Converter, which helps you convert EMLX files to MBOX format quickly and safely. It preserves the original folder structure, attachments, and formatting, even when converting multiple files at once. This way, you save time, avoid data loss, and ensure that your emails stay accessible in clients like Thunderbird.

Frequently Asked Questions:

Q1. Why would I need to convert EMLX files to MBOX?

Ans: EMLX files are exclusive to Apple Mail and cannot be opened in many other email clients. Converting them to MBOX ensures compatibility, easier backups, and smoother email migration across platforms.

Q2. Is it possible to convert EMLX files on a Mac?

Ans: Yes, EMLX files are stored on Mac devices, and with the right tool, you can efficiently convert EMLX to MBOX without losing data or attachments.

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About The Author:

Rohan Wiese

As a lead technical writer, I know the technical problems faced by office and professional users. So, I decided to share all my technical knowledge through this blog. I love helping you with tough challenges when dealing with technical issues.