RecoveryTools Thunderbird Import Tool

(Average Rating 4.9 Based on 989 Reviews)

The best utility to import MBOX files to Thunderbird in bulk. Preserves the properties, inline images and attachments of all imported files (MBOX without extension, .mbox, .mbx, .mbs, .eml, .emlx, Maildir).

Thunderbird import tool




RecoveryTools for
Thunderbird Import Wizard

Import All Emails from MBOX to Thunderbird
Move Data Directly into Local Folders & POP Account
Maintain Email Properties, Inline Images & Attachments
  • Import MBOX, EML, EMLX, Maildir files in Thunderbird
  • Support all size of MBOX file as there is no file size limitation
  • Uphold folder hierarchy & meta properties during upload
  • Import multiple emails in bulk along with attachments
  • Date Filter option to import emails of certain time period
  • Supports MBOX file of all origins like Thunderbird, Mac Mail, Gmail, etc.
  • Add MBOX files to configured Thunderbird accounts & Local Folder
  • Retains all metadata of imported files in Thunderbird application
  • Thunderbird Importer is available for both Mac & Windows OS
  • Compatible with all versions of Windows including Win 11, 10, 8.1, 7

Import MBOX to Thunderbird Along with Other Files

supports maildir

Add Maildir Files to Thunderbird

Thunderbird Import Wizard supports all file formats of Thunderbird email client. It provides the option to select and add multiple maildir files to Thunderbird account. The software provides the option to select the Thunderbird identity to directly import these files to Thunderbird in bulk.

supports eml

Add EML Files to Thunderbird

Thunderbird Importer also supports EML file format. These single message files are easily imported in Thunderbird profile one at a time or all at once. The tool renders the option to apply date-range filters to upload selective files that contain message falling between the set "From" & "To" date.

supports emlx

Add EMLX Files to Thunderbird

Thunderbird Import tool is not limited to importing MBOX to Thunderbird local folders. It has multiple options on its starting screen to select the data file of your choice like EMLX file. Using this option, one can add these files in bulk and upload them all into Thunderbird in a single go.

Highlighted Features of Thunderbird Import Wizard

Add Multiple MBOX Files to Thunderbird in Bulk

Dual Options to Import MBOX Files

The tool allows users to import several MBOX files into Thunderbird. It provides two options to open a file i.e. File Mode and Folder Mode. The application supports MBOX files created in both Windows and Mac OS email clients for smooth importation.

  • Add File: This option enables users to select MBOX files individually.
  • Add Folder: This option enables users to select a folder containing one or more MBOX files.

Supports Multiple File Formats

Various email clients generate files other than MBOX for email file storage. Thunderbird Import Wizard provides the option to import the following files in Thunderbird in bulk with attachments.

  • Maildir files
  • EML files
  • EMLX files
  • MBOX/MBX/MBS files

Date Filter Option

Thunderbird Importer has an advanced date filter option which allows users to filter emails date wise. Instead of uploading entire MBOX file, users can apply filter using 'From Date' to 'To Date'. This feature is helpful when users want to import emails of a specific time period.

Keep Folder Structure Intact

While importing MBOX to Thunderbird, there is an option available named Maintain Folder Hierarchy which sustain folder structure by keeping emails inside their original folder. The tool also preserves data integrity by keeping meta properties such as Subject, Date, etc. intact.

Load & Import File of Any Size

Thunderbird Import Tool doesn't have any restriction on the size of MBOX files. It can add all sizes of MBOX / MBX / MBS files and import unlimited emails from MBOX to Thunderbird.

Import Emails into Desired Profile

This feature is best suited when Thunderbird is configured with multiple accounts. In such case, the tool provides an option to select desirable profile in which they want to import their emails.

Generate Import Status Report

After completion of the process, the tool generates export report containing name of the MBOX file, size, number of emails, time taken in import process of each MBOX file. The file can be saved in CSV format on the local drive.

Intuitive Graphical Interface

The application is best known for its intuitive interface. It makes the task so much easier that even non technical perform can easily import various MBOX files. Each and every step is described in a simpler manner.

Compatible with All Windows Versions

The tool can be run on all the latest versions of Windows operating system that includes Windows 11 (64-bit), 10 / 8.1 / 8 / 7 (32-bit & 64-bit).

Import MBOX to Thunderbird Mac

Users can also import MBOX files to Thunderbird on Mac OS X 10.8 & all above versions. There is a separate tool for Mac that has an additional option to import address book (Sqlite, vcf and ldif).

Thunderbird Import Tool Specifications

Download Tool to Add MBOX to Thunderbird on Mac & Windows

Software Download


Download Now

Size : 7.87 MB

Version : 4.1


Download Now

Size : 33.9 MB

Version : 6.0

Trial Limitations

The Windows version of the tool allows to import first 25 emails per MBOX files;
Thunderbird Import Wizard for Mac allows to import first 10 emails only.

System Specifications


Hard Disk Space
Minimum 100 MB of free hard disk space

4 GB is recommended

Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz


Hard Disk Space
100 MB of free hard disk space required

4 GB is recommended

Mac Computer with Intel Processor
Mac Computer with Apple Silicon (Apple M1)



  • Microsoft .NET Framework v4.5
  • Thunderbird should be installed and configured on the Windows system.


  • Java JDK 1.8.0 & JRE 8 should be installed in the system.
  • Thunderbird must be installed and configured on the Mac system.

Thunderbird Import Wizard Full Version vs Trial Version

Comparing the Features of Software to Import MBOX File to Thunderbird in Trial and Full Version


Trial Version

Full Version

Add MBOX / MBX / MBS Files

Add EML / EMLX / Maildir Files

Import Emails & Attachments

Supports Windows OS 11 , 10, 8, 7 & Windows Server 2019, 2016, 2012 R2, 2008

Date-range filters

Import MBOX to Thunderbird

25 Items / Folder

add mbox files to thunderbird faqs

Frequently Asked Questions

No manual or professional solution can directly import data into an IMAP configured account in Thunderbird. But, you can import MBOX emails to Thunderbird Local folders and then drag and drop all the imported emails into the required IMAP configured account.

Yes, Thunderbird must be installed and configured properly for valid profile.

Yes, Thunderbird Import Tool provides an option to add multiple files and import all files at once.

Yes, it imports any size of MBOX files within few clicks.

Yes, this standalone application is compatible to run on 64-bit Windows 11 OS.

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