Summary: Learn how to convert PST into MBOX file to access Outlook emails in other applications. Solve manual exporting issues by using converter tool on Windows & Mac Operating system.

Nowadays the MBOX file mostly supported file format by the email clients both in Windows and Mac OS. For the use of PST email file in email client other than Outlook, it is necessary to change PST file into MBOX format. In this article, we are going to discuss How to convert PST into MBOX file format with the support of some user queries.

User Query 1:  I have some Outlook 2010 emails with me that I want to export to Mac Mail in my Mac Book Pro. The total size of the PST file is more than 10 GB so I cannot use IMAP to import. Please tell me how to convert PST into MBOX ? which is supported by Mac Mail.”

User Query 2:  “All my Outlook Mail data is stored in a PST file as the backup. I want to use that backup in Thunderbird and for that, I want to migrate .pst to .mbox file. Is there any solution to my problem? 

User Query 3:  “Can anyone help me to know how to export PST to MBOX file properly using the manual method? Because I’m having trouble to convert emails from MS Outlook to Apple Mail (PST to MBOX) using the manual method. Also please suggest me a suitable software to export Outlook emails to MBOX file & avoid these issues.”

Do you also have the same query, how to convert PST to MBOX format? In that case, this is the right post for you. After reading this post, users will be able to perform this file conversion for opening Outlook emails in Thunderbird, Apple Mail, Mac Mail, Eudora, etc.

Now is the time to share some of the most used techniques of exporting Outlook emails into MBOX format. First of all, we will learn manual methods to move PST files into MBOX format. Then, we will get familiarized with an Outlook PST to MBOX Converter software that can provide a reliable solution.

If users want to perform PST to MBOX file conversion on Windows system, they will need both MS Outlook and Mozilla Thunderbird.

a)  Search for Default App Settings on Windows and access the list of Default Applications.

b)  Make sure to have Outlook as your default email application. If it is not, then click on the default

  email and choose Outlook from the list.

c)  Launch Mozilla Thunderbird and click on Tools >> Import.

d)  From the dialog box, select ‘Mail’ option and click on Next.

e)  Select Outlook  >> click on Next >> Finish.

f)  When the Outlook PST emails are transferred to Thunderbird make Thunderbird your default email by going to Default Apps Setting.

g)  Now, start Thunderbird again and the imported Outlook data folder will be there. Select the folder.

h)  Click on Tools >> ImportExport Tools >> Export folder (.zip). Also, select the destination folder.

Go to the location after file export is done. To get the MBOX file you have to extract the ZIP file. Thus, you have successfully converted Outlook to MBOX on Windows.

If you wish to export PST to MBOX on Mac machine, you can do it manually using Mac Outlook.

1. Start Outlook for Mac email client on Mac machine.

2. Select File >> Import.

3. Choose “Outlook Data File (.pst or .olm)” >> click on right-arrow.

4. Select “Outlook for Windows Data File (.pst)” and then click on right-arrow again.

5. Navigate to the location where the PST file is saved and select to open it.

6. Click Import to import the PST file in Mac Outlook.

7. Move to the Mac Outlook home screen. You can see the imported PST file under On My Computer section.

8. Restore down the Mac Outlook window and drag the PST folder to the desktop. You will find the dragged folder being saved as MBOX file.

I think now you all know how to convert PST to MBOX file format manually. But these manual methods take a considerable amount of time to convert outlook emails to MBOX file and also it required the installation of other applications. It makes the users feel like manual methods are a complicated and troublesome process. Here is the fastest and easiest method for users who prefer straight approaches.

These lengthy manual methods require the installation of some extra email applications. If you are not willing to install these applications, Outlook PST to MBOX Converter is a better solution. With the help of this application, users can convert complete PST file emails into MBOX format. The resultant MBOX files are fully compatible with being imported into any supported email client

1)  Both ANSI and Unicode PST files are supported by this application

2)  No file size limit as such for PST files.

3)  Software available for Windows OS and Mac OS at an affordable price.

4)  Create a single MBOX file for one PST file.

5)  Maintains Data Integrity.

Before purchasing, users can also try the free demo version: 

In this blog, we have answered a common user query, “how to convert PST to MBOX?” In the process of answering, we have provided manual techniques of file conversion for both Windows and Mac users. In the end, we shared a top-notch application called Outlook PST to MBOX Converter. The tool is suitable for both Windows and Mac for smooth Outlook email migration to Apple Mail, Thunderbird, Eudora etc.