Import MBOX to Outlook Account: Easy Step-by-Step Guide

  • Written By  

  • Updated on October 25th, 2025

5/5 - (2 votes)

In a corporate environment, professionals experience challenges related to email compatibility. A colleague sharing an MBOX file with a client working on Outlook will create a technical barrier. The best approach is to import MBOX to Outlook to make the shared email file fully readable and accessible. But, how will the user import the MBOX file into the Outlook account? Read this blog to understand how one can do this conversion manually and directly. The direct solution includes a dedicated Cigati MBOX Converter. Before heading to the solutions, let us first understand why users choose to import MBOX data to their Outlook account.

Why Import MBOX Files into Outlook?

There are a variety of practical reasons why users consider importing MBOX files into Outlook. A few of them are listed below:

  • To benefit from Outlook’s powerful email management tools, users import their MBOX files into it.
  • Many users switch to Outlook from MBOX-supported email clients to access their old email messages.
  • Users who move from macOS to a Windows environment require importing their MBOX files into Outlook.
  • An employee with multiple accounts combines several mailboxes into an Outlook account. They transfer their MBOX file emails for simplified access.
  • By importing MBOX into Outlook, users can ensure that their emails are accessible across devices.

Methods to Import MBOX to Outlook Account

Now, we will begin executing the solutions to import the .mbox files into the Outlook account. There are both manual and automated solutions. Choose the method that is best suited according to your requirements.

Also Read: Import MBOX to iCloud Webmail

Method 01: IMAP Synchronization Method

In this method, we’ll import MBOX to Outlook.com in two steps. We will first import the MBOX file into the Thunderbird email client. Then, sync the data with MS Outlook. If done correctly, it maintains the folder structure.

Follow the step-by-step process to start the conversion:

Step 01: Import MBOX into Thunderbird

  1. Install and open Thunderbird, and click on Account Settings.
  2. Now, press Account Actions > Add Mail Account and enter an IMAP-enabled email account.
  3. Thunderbird will automatically configure the IMAP settings. Then, click Done to finish the process. 
  4. Next, go to Tools > Add-ons and search for and install ImportExportTools NG.
  5. Now, right-click on Local Folders > ImportExportTools NG > Import MBOX file. Select the desired file and import it.

Step 02: Open MBOX File in Outlook

  1. Drag and drop the exported MBOX file from Local Folders to the IMAP-enabled account mailbox in Thunderbird.
  2. In Outlook, navigate to File > Add Account and add the same IMAP Gmail email account. 
  3. Set up the account with the IMAP settings:


Incoming Mail Server (IMAP)
Server: imap.gmail.com
Port: 993
Encryption: SSL


Outgoing Mail Server (SMTP)
Server: smtp.gmail.com
Port: 465 or 587
Encryption: SSL
  1. Now, Outlook will begin syncing the emails depending on the mailbox size. 

Limitations: The entire IMAP synchronization process becomes slow when handling large mailboxes. The email attachments may not synchronize properly in a few cases. The time required for syncing the emails depends on the internet connection speed. 

Method 02: Using Email Clients

This method uses both Thunderbird and Outlook mail clients to upload MBOX to Outlook. First, convert the MBOX format to the EML file format and then import it to the Outlook account. 

These are the steps to follow to begin the process:

  1. Open Mozilla Thunderbird and configure an email account containing your MBOX file.
  2. Then, navigate to the File tab and choose ImportExportTools NG.
  3. Now, select Import MBOX file and browse and choose the desired MBOX file to import.
  4. Select the emails you want to export and drag and drop them into a local folder. These will be saved as an .eml file.
  5. Next, drag and drop the .eml files to the Outlook folder. 

Limitations: Importing large files can become a tedious and time-consuming task. Sometimes the attachments and formatting may be lost. 

Top-Notch Utility to Import MBOX to Outlook Account

With the Cigati MBOX to PST Converter, users can safely import large volumes of MBOX files to the Outlook account. In addition to importing into Outlook, the tool supports migration to other cloud platforms. Besides this, it can bulk convert MBOX files to other file types as well. Before the conversion, users can preview emails and attachments.

Simple and quick steps to import MBOX files into Outlook:

  1. Launch the tool on your Computer to get started.
  2. Then, press Continue to move forward.
  3. After that, select Add File button to locate and select the .mbox file.
  4. Now, expand the folder hierarchy, select the folders, and preview the email content.
  5. Next, choose the output format as PST and set the additional settings if required.
  6. Specify the destination path and hit the Convert button. 

Conclusion

The MBOX to Outlook import process plays an essential part while switching from macOS to a Windows environment. One could try the native method, but it is technically complicated. Therefore, choose a professional tool like Cigati MBOX Converter to bulk import MBOX to Outlook account. It imports the MBOX data securely without any data loss.

You May Also Read: Import MBOX to Office 365

Frequently Asked Questions

Q: Can I import MBOX to Outlook 365 on Windows?

Ans: Yes. You can import the MBOX files to Outlook 365 on Windows, but not directly. In Windows, you need to first convert MBOX to PST and then import the PST file into Outlook. And for Mac users, convert the MBOX file to EML format and then access it in Outlook.

Q: What are the risks of manually importing MBOX to Outlook?

Ans: One of the critical risks of manually importing the MBOX to Outlook is the loss of data. During the process, if the connection fails or a step is missed, it can lead to loss of essential email data. Hence, we recommend users to use a dedicated tool to import the .mbox files into Outlook.

About The Author:

Rohit Singh is an Email Backup, Recovery & Migration Consultant and is associated with Software Company from the last 3 years. He writes technical updates and their features related to MS Outlook, Exchange Server, Office 365, and many other Email Clients & Servers.

Related Post

100% safe and secure100% Safe & SECURE
SupportLifetime Support (24X7)
Money BackMoney Back Policy
Trusted by CustomersTrusted by 10000+ Customers