Our organization had decided to migrate from Thunderbird to Outlook email client. This required converting all MBOX files into PST file format and migrating the data from one email platform to another. As the manual conversion of data files was quite tedious and time-consuming, I searched for an MBOX to PST converter tool that could ease the process and save us some time and effort.

Stellar Converter-for-MBOX

Based on several relevant features and software reviews, I decided to try Stellar Converter for MBOX, which can convert all components of MBOX file to Outlook PST, without any data loss.

What makes Stellar Converter for MBOX a versatile software?

The software is an easy alternative for converting MBOX files into PST as it converts multiple email clients in a single process using minimal effort. Moreover, no technical assistance is required for the conversion process; you can just Select the MBOX file, Scan mailbox data, and save in PST format.


Stellar Converter for MBOX is essentially a utility-oriented program. The interface is simple and lets you navigate easily through the software features.

To convert MBOX to PST, I selected the email client from the dropdown list on the main interface and selected Thunderbird, the email client from which the migration was to take place.

I was surprised to see that a single software supports as many as 17 MBOX-based email clients namely—Thunderbird, Spicebird, Entourage, Pocomail, Eudora, AppleMail, Mulberry, SeaMonkey, Netscape, ClawsMail, OperaMail, MozillaMail, Evolution, Sylpheed, Cone, Mutt, and Gnu.

Next, I selected the file for conversion. Stellar Converter for MBOX listed the MBOX file in File Path. Then, I clicked Convert to start the process of MBOX to PST conversion.

Select MBOX

Figure 1: Main Interface of Stellar Converter for MBOX


Stellar converter took some time to scan and convert MBOX file, but that was not an issue as the conversion process was running in the backend. I could work on other applications such as documenting my notes, while the software worked. The software also previewed the scanned data for validation.

Stellar Convertor for MBOX

Here, I would say that it won’t be wise to click the Stop button, available in red color. It may have stopped the conversion process so I had to start all over again.


I think the converter software converted nearly all components of selected MBOX file including emails, attachments, contacts, calendars, journals, etc. into PST format. It also maintained the folder hierarchy for easy PST-import into Outlook.

The software performed as per my expectations and I could easily validate all the mailbox components.

Once I had validated my mailbox data, I saved the data by clicking Save on the main menu. The software provided multiple saving options including saving the converted data as New PST or appending to the existing PST.

As I had to migrate data from Thunderbird to Outlook, I selected the save as New PST option from the Save Options menu.

The software also provided an ‘Apply Filter’ feature to help in converting only the relevant data. I could exclude data from emails IDs which were not significant, anymore.


Before opting for the final purchase, the software allowed to try it for free by using demo version. The trial version converts all mailbox data and previews it for validation. Assuming that converted data is available in the saved PST, I can recommend Stellar Converter for MBOX software, without any second thought.

The software also provides multiple options for mailbox export and conversion:

  1. Converts or exports all data from a single mailbox
  2. Converts or exports selective emails from a single mailbox
  3. Converts or exports data of multiple mailboxes

In addition, the Apply Filter feature helps filter redundant data from the mailbox.

Some of the key features of Stellar Converter for MBOX are:

  • Supports 17 MBOX based email clients
  • Allows to preview converted emails before final conversion
  • Appends MBOX data to existing PST or saves it in new PST
  • Exports MBOX data to Office 365, and also saves in – RTF, PDF and HTML formats
  • Saves selected emails in EML and MSG format

All activities performed by the software are logged in the Log Report. This Log report helps in analyzing the entire conversion process including selected, scanned and converted file data. It also helps in validating the converted data.


Stellar Converter for MBOX comes in two versions – Corporate and Technician. The main difference is that the Technician version provides multiple options for saving and exporting the converted MBOX data. It saves the converted data in existing PST, HTML, RTF and PDF format or exports the converted data directly to Office 365 and other Outlook profiles.

In addition, the Technician version converts multiple MBOX files into PST file format.

Purchasing the software requires activating it with a valid Activation Key, which is provided by the Support team via email after order confirmation.


MBOX to PST Converter software easily converts all MBOX files to PST. With a couple of extra features such as attachment preview and displaying the time taken for conversion of mailbox data in Log report, it would be a perfect software.

These are my key takeaways from Stellar Converter for MBOX. Based on the software performance, and ease of use, I would recommend this software to anyone who is migrating from an MBOX-based email client to Outlook.

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