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Import MBOX to PST for Outlook – Free Methods

Aldrich Calvin | Modified: 2021-11-23T07:58:48+00:00|Tips | 7 Minutes Reading

Presently, MBOX file is the most popular file format which many email clients utilize for storing their mailbox items. For example: Thunderbird, Mac Mail, Entourage, Eudora, Powermail, etc. In fact, there are several cases where users need to import MBOX to Outlook mail client version 2019, 2016, 2013, 2010, 2007 or 2003. To do this, one needs to convert MBOX to PST (Outlook data file). Generally, it is due to work-related requirements that users prefer Outlook over MBOX email clients.


Technical Introduction of MBOX and PST file formats

MBOX is a generic file format that comes in multiple variations such as mbx, mbox, mbs files. As a matter of fact, each email client uses a separate variation like Thunderbird makes use of MBOX files without extension, Apple Mail prefers the .mbox extension files, Opera uses .mbs files, etc. Here, one thing that remains common in each of them is that the storage is limited to emails and attachments.

However, PST files is an open proprietary file format, which Microsoft controls. In fact, it stores copies of messages, contacts, calendar events, and other items. Moreover, Microsoft software, for example MS-Outlook, MS-Exchange client, Windows Messaging support PST file format. Overall, because of its usability and portability features, it is preferred over MBOX.

In addition to that, both of them MBOX email clients as well as Outlook 2019, (or any other version) do not provide any native facility for email transfer between them. Due to the technical implications of these email formats, users need to convert MBOX files to PST for accessing its emails in Outlook 2019.

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A Free Method to Import MBOX to PST in Outlook 2019

Here, we will take advantage of a free email client i.e., Thunderbird as an intermediate to move MBOX files into Outlook 2019. For this, you just have to follow these easy steps:

  1. Use Mozilla Thunderbird to import MBOX File
  2. Save Emails as EML file in Thunderbird
  3. Drag and Drop EML files into MS Outlook
  4. Export emails to PST file

I. Use Mozilla Thunderbird to import MBOX File

  • First, download and install Thunderbird email client. Configure it with any dummy or valid webmail account

install thunderbird

  • Now, go to Tools menu and click on Add-on option (Press Alt key if the menu is hidden)

click on add-on option

  • Here, search for importexport in the search bar

search for importexport ng tool

  • Then, Click on Add to Thunderbird button corresponding to ImportExportTools NG

add to thunderbird

  • Here, hit Install Now button to install this free add-on and restart Thunderbird application

install the free add-on

  • Now, select Local folders in mailbox list and go to Tools > ImportExportTools NG > Import mbox file

import mbox file to outlook

  • Afterward, proceed with the instructions and select the MBOX file(s) to import. You will see the imported MBOX file appearing under Local Folders mailbox.

II. Save Emails as EML file in Thunderbird

  • Open the imported mailbox file and select all the emails that you want to migrate to Outlook.

select eml files

  • Right-click on them and select the Save As option.

save mbox emails as eml

  • Specify a location to save your emails as EML files. You will find all your emails in the selected folder.

III. Drag and Drop EML files into MS Outlook 2019

  • Create a new folder in Outlook 2019 interface. Now drag and drop all the saved EML files into this mailbox folder. All your emails should start appearing once the files are imported.

You will notice that Outlook does not preview some emails. There is nothing you can do about it. The only alternative to this free solution is to open EML files in Outlook by right-clicking on it one at a time and then, use “Move to” to move them to a Outlook folder. And that’s a really really long process.

IV. Export PST File from Outlook 2019

If you specifically desire PST files, you can use the native Import/Export feature of Outlook 2019 for this.

  • Go to File menu and select Open & Export > Import/Export.

use import export mbox to outlook

  • Select Export to a file option and hit Next.

select export to file option

  • Choose Outlook Data file(.pst) and again hit Next.

select outlook pst file to export

  • Select the mailbox folder in which EML files were imported and hit Next.
  • Provide a location to export the emails and click Finish.
  • A PST file will appear at the selected location.

Reliable & Automated Way to Convert MBOX to PST

The manual method is quite time-consuming and lengthy process for converting MBOX files into PST for Outlook. It could be a good approach if user has to perform this conversion on less number of emails. Furthermore, users require to have technical knowledge of both Thunderbird and Outlook to succeed in this method.

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Therefore, in order to avoid drawbacks of manual method, it is better to go for professional solutions. Such tools like SysTools MBOX to Outlook Converter offers a varied set of features which makes the process of importing MBOX to Outlook easier for users. Moreover, It allows users to select particular emails/files to convert into Outlook PST format. As a matter of choice, you can even filter out emails based on a date range.

It allows to freely convert 25 emails per folder from MBOX to PST and preview all the emails along with attachments.

Simple Steps to Convert MBOX to PST for Outlook

  • Step 1: Launch SysTools Converter and click “Add Files”.

launch mbox to pst converter

  • Step 2: Click “Next” and Import MBOX files into it.

import mbox files

  • Step 3: “Preview” all the Emails and Attachments once the MBOX emails get scanned.

preview mbox emails

  • Step 4: Set the Export type to “PST”¬†and save the file at the desired location.

select pst

  • Step 5: Import the PST file into Outlook 2019 with the free native option.

If you do not know how to import PST file into Outlook 2019, then follow the steps given below:

  • In MS Outlook 2019, go to File and select Open & Export > Import/Export

import-export menu of outlook

  • Now, select Import from another program or file in the Import and Export wizard

select import from another file option in outlook 2019

  • Then, Choose the option Outlook Data file(.pst) and hit the Next button
  • Afterwards, Navigate and select the PST file that you wish to import into Outlook 2019 and apply other options as per preference. Click the Next button.

select pst file to import into outlook

  • Lastly, choose Import items to current folder and click Finish.
  • Now, all your data is successfully imported in MS Outlook 2019 in a matter of seconds.


Though manual methods to import MBOX to Outlook is free of cost and easily available, yet these are quite a time taking and tedious practices. In fact, it doesn’t matter which email client users are working with, moving its data into Outlook 2019 is not easy. So, in this article, we have discussed solutions corresponding to how to convert MBOX to PST in Outlook 2019. Here, we have also provided information about an automated MBOX Extractor that quickly transfers MBOX files to PST and import it in Outlook 2019. It’s equally important that you be sure to try the free trial version before deciding anything!


1. Is there any manual way to import MBOX files into Outlook?
Yes, there are free methods that can transfer your MBOX data to PST in Outlook. These are explained in the article with screenshots.

2. Are the given solutions applicable to Outlook 2016 & 2013 versions?
Yes, all the proposed methods are applicable to MS Outlook 2016, 2013, 2007 along with the 2019 version.

3. Can I get a method that can convert MBOX emails without using Outlook?
Yes, of course. The last solution provided in the article is capable of exporting multiple MBOX files without the requirement of the MS Outlook platform.

4. I also want MBOX files in Outlook compatible format, but I require MSG files. What method should I use?
The automated smart solution has your answer. Other than PST, it also allows you to convert MBOX to EML, MBOX to MSG, HTML, PDF, EML, and NSF formats.

5. Will I be able to import MBOX to Outlook on Mac OS?
The proposed free solutions are applicable for Windows PC only. However, you can import MBOX files into PST for Outlook using SysTools Mac MBOX Converter software.