Import MBOX to Gmail: A How to Guide

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  • Updated on March 18th, 2025

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The MBOX file format is commonly used by various email clients, including Thunderbird, Gmail, Apple Mail, and Postbox. Thunderbird, an open-source program, is free to download. If you’ve used Thunderbird to store your emails, you may want to import those MBOX files to Gmail. While this process can be a bit tricky, there are several methods available to make it easier.

This guide will walk you through how to import MBOX files to Gmail, whether or not you use Thunderbird. We’ll also explore when you might need to transfer MBOX files into your Gmail account. Keep reading to complete your migration successfully.

Common Reasons for Importing MBOX to Gmail

Today, Gmail is the go-to email service for millions around the globe, boasting over 1.5 billion users. Many users prefer Gmail for its wide array of features, which include:

  • Cloud storage: Gmail offers cloud-based storage, meaning you can access your emails from anywhere, at any time, as long as you have an internet connection.
  • Universal necessity: For many platforms, having a Gmail account is mandatory—such as for filing taxes or using various government services.
  • Video calls and messaging: Gmail offers Google Meet and Hangouts for free, enabling communication with colleagues, friends, and family.

These are just a few reasons why Gmail is the most popular email service in the 21st century. Now, let’s look at how to import MBOX files into Gmail.

How to Import MBOX Files into Gmail

Importing MBOX files into Gmail doesn’t have to be difficult. Below, you’ll find two methods you can follow: one with Gmail’s built-in import feature and another using Thunderbird.

Import MBOX to Gmail Without Thunderbird

This method is straightforward and easy enough for non-tech-savvy users to handle. However, there are a few limitations, which I’ll outline after the procedure:

  1. Log in to Gmail: Open your Gmail account.
  2. Go to Settings: Click the gear icon and select Settings.
  3. Select “Accounts and Import”: From the menu, go to the Account and Import tab.
  4. Click “Import mail and contacts”: This will open a pop-up window.
  5. Enter your Thunderbird email address: Provide your Thunderbird email address and click Continue.
  6. Enter your password: Input the password for the respective account and click Continue.
  7. Choose Data to Import: Select which data you want to import and click Start import.

This method works well if you’re still using Thunderbird and want to directly import MBOX emails. However, it has some drawbacks:

  • You cannot filter unwanted emails, so unnecessary items might end up in your Gmail account.
  • The process can be slow, taking up to two days to import a single Thunderbird account.
  • You can’t import emails from multiple Thunderbird accounts at the same time.

Import MBOX to Gmail Using Thunderbird

If you prefer using Thunderbird, follow these steps:

  1. Open Thunderbird: Launch the Thunderbird email client.
  2. Go to Account Settings: Click the Thunderbird menu and select Account Settings.
  3. Add Gmail Account: Click Account Actions and choose Add Mail Account.
  4. Enter Gmail Details: Provide your Gmail email address and password.
  5. Select IMAP or POP: Choose either IMAP or POP, and click Done.
  6. Grant Permissions: Log in to your Gmail account and allow the necessary permissions.
  7. Select Emails to Import: After your Gmail account is added to Thunderbird, select the emails you want to import.
  8. Move Emails to Gmail: Right-click on the selected emails, go to Move To, and choose your Gmail account.

While Thunderbird provides a way to import emails, the method has its downsides, such as:

  • It can be time-consuming.
  • You can’t filter out unwanted items.
  • Only one Thunderbird account can be imported at a time.

Importing MBOX to Gmail Directly: The Best Option

Both methods outlined above work to some extent, but due to potential data loss and slow speeds, they may not be ideal. Many users and businesses prefer using professional tools like MyDigiSoft MBOX to PST Converter for efficient MBOX to Gmail migration. This tool offers advanced features such as data filtration, incremental export, and source/target mapping. You can even try a free version of the software to assess its capabilities.

Step-by-Step Process Using MyDigiSoft Gmail Backup and Restore Tool

To evaluate the tool, follow these steps:

  1. Install the Tool: Download and install the MyDigiSoft Gmail Backup and Restore tool.
  2. Select Export Option: Launch the tool and select the Export option, then choose the MBOX file option.
  3. Add MBOX Folders: Add the MBOX folders you want to import and map them to your Gmail account.
  4. Use Filters: Apply filters to export only the desired data.
  5. Restore Data: Click Restore to start the MBOX to Gmail migration.

The software allows you to import multiple MBOX files without any size or number restrictions, making it perfect for bulk imports. You can even back up your Gmail account in PST format if needed.

Conclusion

Migrating MBOX files to Gmail is a common task for many users moving from Thunderbird or other email clients. While the built-in methods are available, using a professional tool like MyDigiSoft MBOX to PST Converter provides a more reliable and efficient solution. The free version allows users to process up to 50 items per folder, making it a great way to test the software before committing to the full version.

Frequently Asked Questions

Q: Can I import MBOX files to Gmail in bulk using MyDigiSoft’s tool?
A: Yes, there are no restrictions on the number or size of MBOX files you can import.

Q: Will my original MBOX file be deleted after importing to Gmail?
A: No, the software only copies the data to Gmail. The original MBOX file remains intact.

Q: How can I get assistance with MyDigiSoft’s tool?
A: MyDigiSoft’s support team is available 24/7. You can reach them via live chat, email at support@mydigisoft.com, or by calling the provided phone number.

Q: What’s the difference between the free demo and the full version?
A: The free demo version allows you to process up to 50 items per folder, while the full version has no such restrictions.

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