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Best Thunderbird Import Wizard – A Software Review

Nilesh | Modified: July 10th, 2023 ~ 5 Minutes Reading

Want to know which one is the best application to import files in Thunderbird like MBOX, EML & Maildir? Read our extensive review of the best Thunderbird Import Wizard Software.

People with knowledge of file formats are familiar with MBOX files. This file format is a common one and is widely used in various email applications. Whether you use Windows or Mac, you will come up with email applications that store their data in MBOX format.

Due to various reasons, people need to open orphan MBOX files and they choose the Thunderbird email application for the purpose of opening. The reason behind choosing Thunderbird is simple. It is a free application and easy to use. Thunderbird can also be run on Windows and Mac OS. But the problem arises when you need to import MBOX file to Thunderbird application.

Flawless and data-loss-free MBOX importation are the keys to the successful opening of the MBOX file in Thunderbird. For that, the manual technique is not reliable. Users usually choose SysTools Thunderbird Importer Tool to import mailbox files like MBOX, MBX, MBS, EML, EMLX, and Maildir. We have chosen this tool for review so that readers can learn about the software in detail.

SysTools Thunderbird Importer Overview

Thunderbird Import Wizard is a top-class software that migrates all types of Mailbox files into the Thunderbird application. With its help, users can import mailbox files into Thunderbird and then open the file content without any trouble. This is a Windows-based software suitable for all Windows systems. It supports MBS and MBX files too, which are variants of MBOX files. It keeps the original metadata of the MBOX file intact even after moving them to Thunderbird.

System Specification

  • Product Developer: SysTools Software
  • Version: 4.1
  • File Size: 7.87 MB
  • Supported Language: English
  • Supported OS: Windows 11(64-bit), 10, 8.1, 8, 7
  • Also Available for Mac OS.

Top Features of  the Best Thunderbird Import Wizard

Here are some of the amazing features of this utility:

  • Move Any Number of MBOX Files at a Time: With the help of this tool, users can easily import any number of Mailbox files into the program. They can add a single file or a folder containing many MBOX files in it.
  • Date-based Data Filter: If you do not want to import complete data from the MBOX file, you can take the help of the Date-filter feature of this tool. Using it, data of a particular date range can be migrated into the Thunderbird Email.
  • Import into any Thunderbird Account: You may have configured accounts in Thunderbird with POP or IMAP protocol. With this software, you can import the Mailbox files in any configured account of Thunderbird. You can also import in Local Folders of Thunderbird.
  • Maintain Folder Hierarchy: If users want to retain the original folder hierarchy after importation, they can select Maintain Folder Hierarchy option to keep the folder hierarchy of the source MBOX file even after the migration.
  • Suitable for all TB Versions: Unlike other applications, this tool is suitable for all the versions of Thunderbird including Thunderbird 91.*. Users will not face any hardship or compatibility issues while using this tool on any Thunderbird.
  • No File Size Restriction: While using this application, users do not have to worry about the file size of the MBOX file. No matter what is the size of your MBOX file, the software will import it without any data loss or application error.

Pros and Cons of Best Thunderbird Import Tool

Like any other software, this tool also has some pros and cons.


  • Best service at an affordable price
  • No data loss or data corruption
  • Process multiple MBOX files at once
  • Option to choose destination account
  • Support for all types of MBOX files


  • Only available in the English language
  • Cannot import data directly into IMAP account (Nothing can).

Thunderbird Import Wizard for Windows

It is quite easy to use this software. Because of its simple interface, anyone can run this application without any problem. You have to do is to follow these steps:

  • Launch best Thunderbird Import Wizard and add MBOX file.
  • Set the date-filter option to export selective data.
  • Choose the target Thunderbird configured profile from the list.
  • Click on Import to migrate added files to Thunderbird.

Thunderbird Import Wizard for Mac

This software is also available for Mac.

It has some features that differ from the Windows version. Let’s take a look at them:

  • Import MBOX, MBS, MBX, EML, EMLX, Maildir files
  • Also includes option to import address book into Thunderbird
  • Supports LDIF, VCF (vCard), and Sqlite address book formats
  • Open mailbox files in Mac Thunderbird application
  • Works on Mac OS X 10.8 and all above versions including mac OS Monterey


If you want to open MBOX, Maildir, or SBD folders, you have to import the file into Thunderbird first. To do this, the best Thunderbird Import Wizard is the right choice. We have tested this utility under different conditions and it turned out to be the best in all the situations. We are happy to rate this software 9.5 out of 10.