File Conversion

How to Import MBOX to Outlook 2021?

Summary: This blog will guide you to open MBOX file in Outlook 2021 interface. If you are among those who want to import MBOX to Outlook 2021, then this article is for you.

MBOX is a common file format used by many email clients such as Seamonkey, Thunderbird, Eudora, and many more. However, this file format can easily be corrupted and hacked. To avoid any damage to your important data it is best to use a more secure application.

What is more secure and feature-rich other than Microsoft Outlook?

Outlook is the most popular desktop email client and most companies prefer this application. Its security features prevent its user’s data from being attacked by hackers and spammers.

Although Outlook releases new updates regularly. Recently on October 5, 2021, Microsoft released Outlook 2021 version with more advanced features. Thus this itself tempts users to opt for this new version.

If you are among those who want to save their MBOX file, then it is best to import MBOX to Outlook 2021.

Now you must be wondering, how to transfer MBOX file in Outlook 2021?

Before we move further, let’s know the new features in the new Outlook version

What’s New in Outlook 2021?

If you wish to use Outlook 2021 on your Windows OS, then you will get all the features of Outlook 2019 along with some additional features that include,

  • Instant Search to quickly find emails from the mailbox.
  • Translate emails into 70+ languages
  • New and variety of stock images and icons.
  • Many more.

Let’s without any delay know the ways to read MBOX file in Outlook 2021 without any interruption.

Methods to Import MBOX to Outlook 2021

In this blog, we will discuss two solutions to open the MBOX file in Outlook 2021 interface.

#1. Automated Approach Via MBOX to Outlook Import Tool
#2. Manual Way Via Thunderbird – Gmail Configuration

Let’s move ahead and discuss these processes in detail with step by step instructions. To know them, read the complete article.

How to Import MBOX Files to Outlook 2021 in Bulk?

If you have multiple .mbox files and want to save their data in a secure environment, then transfer MBOX files into MS Outlook 2021 using the MBOX Converter tool. Using this converting tool users can read multiple MBOX files in Outlook 2021/ 2019/ 2016/ and all other previous versions.

There is no restriction on transferring any size of the .mbox file. Users can move multiple data files into any email client without facing any issues. With its simple interface, any novice user can operate this file tool and import MBOX to Outlook 2021 and other versions without any issue. Along with that, you can also transfer MBOX to Gmail, Office 365 and many other webmail accounts.

Along with that, this software allows you to transfer only selective emails from the MBOX file to Outlook 2021 account. Some of the other outstanding features are – an advanced search option to find specific emails, maintain folder and sub-folder structure and hierarchy, transfer unlimited-size data files, and many more.

download MBOX to Outlook Import tool

Follow the steps to transfer MBOX File data into Outlook 2021

  1. Install and launch SysConverter for MBOX tool on your system.
  2. After that click on Open and move further.

    read MBOX file in Outlook 2021

  3. Now select Email Data File >> MBOX File >> Select File or Folder.

    import MBOX to Outlook 2021

  4. Here you can see all the emails from the .mbox file. Read them and select the email folder that needs to import.

    open MBOX file to Outlook 2021

  5. After selection click on Export and choose PST file format.

    Import MBOX to Outlook 2021

  6. At last, browse the location to save the .pst file on your system and then click on the Save button.

    Import MBOX to Outlook 2021

Here complete the process. Now you can import MBOX to Outlook interface. To know how to do the same, then follow the below steps.

  1. Open Outlook 2021 on your Windows OS.
  2. Now go to File >> Open & Export >> Import/Export.
  3. Click on Import from another program and file.
  4. Select Outlook Data File (.pst) from the given two options.
  5. Locate the .pst file from the saved location an click on the Next button.
  6. At last, select the folder that wants to be transferred to and click on the Finish button.

This is the secure way to import MBOX to Outlook 2021 and all other previous versions without any data loss. However, there is no direct manual way to transfer the .mbox file to MS Outlook 2021. Still, indirectly you can perform this import process. Read the next segment of this blog and learn about the efficient and secure import procedure.

How to Manually Transfer MBOX to Outlook 2021/2019/2013?

In this method, firstly you need to upload .mbox file into Thunderbird (or another email client that supports this format). After that configure Gmail to Thunderbird and move .mbox data to the Gmail account. At last set up your Outlook 2021 with Gmail account.

This process seems lengthy. It is a time-consuming process. To avoid it you should opt for the automated method mentioned in the previous section.

Let’s check how this method works. Before we start it is suitable if you create a new Gmail account to avoid any issues.

Step 1. Configure Gmail to Thunderbird

  1. Firstly prepare your Gmail for import. Open Gmail and click on Settings>> See all settings.
  2. 2. Click on Forwarding and POP/IMAP >> Enable IMAP.
  3. Now Open Thunderbird Account for further procedure.
  4. Then click on the Gear button and click Account Setting.
  5. 5. Here hit on Account Actions and choose Add Mail Account.
  6. Enter your Gmail email address and password.
  7. After that a Gmail login window will appear, again enter your credentials.
  8. Click on Allow to permit Thunderbird to read your Gmail emails.
  9. At last hit on the OK button. Here completes the Thunderbird- Gmail setup.
  10. Now import MBOX to Thunderbird account.
  11. Copy all the emails from the uploaded .mbox file, then paste them into a folder under the Gmail section. (Create a new folder under the Gmail label). Now all MBOX file emails are transferred to Gmail.

Step 2. Configure Gmail to Outlook

  1. Open Outlook 2021 on your system.
  2. Click on File >> Info >> Add Account.
  3.   Enter Gmail login credentials and click on Connect.
  4. Now you will find all Gmail emails in Outlook 2021 interface.
  5. Drag the folder into the Outlook local folder.

Here complete the process to import MBOX to Outlook 2021 using the native approach.

Although this manual solution import MBOX files into Outlook 2021, there are certain limitations with it.

Limitations With Manual Method

  • If you have large and multiple MBOX files, then this method doesn’t work properly.
  • Risk of data loss and modification.
  • The email folder or sub-folder structure may differ from the original.
  • Time-consuming as well as a lengthy process.
  • No email filter option for selective MBOX to Outlook 2021 Import.

To overcome these drawbacks it is best to use the automated tool mentioned in the above section. It is the best approach to open multiple MBOX files into Outlook 2021 account.


Here in this article, we learn the two different methods to perform the transfer process. While from the above discussion, we can conclude that the manual approach is a lengthy and laborious way to move MBOX to Outlook 2021. Thus using MBOX to Outlook Import tool is your best option. Use the trial version of this utility and open MBOX file in Outlook 2021.

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