MBOX to Thunderbird importer

(Average Rating 4.9 Based on 1951 Reviews)

For Win

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Guide

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For Mac

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Guide

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SysTools Thunderbird Import Wizard

MBOX (Mailbox) is the standard email storage format used by Mozilla Thunderbird, Apple Mail, Google Takeout, Eudora and 20+ other email clients. SysTools software to import MBOX to Thunderbird is a dedicated tool that imports single or bulk MBS, MBX, EML, EMLX, Maildir and MBOX files directly into any Thunderbird profile configured POP, IMAP, or Local Folder.

  • Import MBS, MBX, EML, EMLX, Maildir, MBOX Files to Thunderbird
  • Move Complete Thunderbird Profile to Another Computer
  • Import MBOX Files of Thunderbird, Apple Mail, Gmail, Etc.
  • Import Emails with Attachments from MBOX File to Thunderbird
  • Transfer MBOX to Thunderbird Configured Profiles & Local Folder
  • Importing Single or Bulk Files Using Add File(s) or Add Folder
  • Date Filter Option to Transfer Selective Emails from MBOX Files
  • Allows Users to Import Files from The Custom Profile Path of Identities
  • Feature to Maintain Folder Structure of Source MBOX / MBS Files
  • Complete Retention of Metadata After Adding MBOX to Thunderbird
  • Thunderbird Installation Required to Complete Data MBOX to Thunderbird
  • MBOX to Thunderbird Importer is Available for Windows & Mac OS Versions

Free Live Demo - SysTools Thunderbird Import Wizard Fully Secured Download Version.

Read All Features of Mac Thunderbird Import Wizard

SysTools Thunderbird Import Tool - Video

Watch the video and understand how to import MBOX to Thunderbird profile directly with complete metadata, folder hierarchy, and attachment preservation, requiring no technical knowledge and no data loss.

thunderbird importer tool supported emails

Supported Email Clients for MBOX to Thunderbird Importer

MBOX is one of the most commonly used file extension for storing email client data. Various email applications support MBOX files and save their data in MBOX file format at the back end. To import MBOX file into Thunderbird Windows, this software supports these email clients:

  • thunderbird Mozilla Thunderbird
  • takeout Google Takeout (*.mbox)
  • G vault Google Vault Files(*.mbox)
  • Netscape Netscape
  • Eudora Eudora
  • Apple Mail Apple Mail/ Mac Mail
  • Opera Mail Opera Mail
  • Seamonkey Seamonkey
  • Mulberry Mulberry
  • Entourage Entourage
  • Evolution Evolution
  • Becky Becky! Internet Mail
  • Spicebird Spicebird
  • Mailcopa Mailcopa
  • mbox in Thunderbird Kmail
  • Alpine Alpine
  • Postbox Postbox
  • ConeP ConeP
  • mbox to thunderbird PowerMail
  • Berkeley Mail Berkeley Mail
  • downlod software Pocomail
  • Turnpike Turnpike
  • Claws Claws Mail
  • best move Horde Group Webmail

import MBOX in Thunderbird

Import Complete Thunderbird Profile

If someone is changing their system and switching to a new one, Thunderbird Import Wizard can assist them in moving the entire Mozilla Thunderbird profile. Just go to the location of Thunderbird and select the profile. The Thunderbird Importer tool will easily move the complete Thunderbird profile to another computer including the MBOX and SBD files located within it.

C:\Documents and Settings\*username\Application data\Thunderbird\Profiles\*name.default

ImportExportToolsNG vs SysTools Thunderbird Import Wizard

Users often face issues such as “Thunderbird not importing MBOX through ImportExportTool NG.” To avoid such inconvenient situations, Thunderbird Import Wizard is a better option to import MBOX to Thunderbird. Here we have listed the aspects in which this software supersedes ImportExportTools NG.

Comparison Criteria ImportExportToolsNG
Recommended SysTools Thunderbird Import Wizard
Cost Free (open-source) $29 One-Time (Lifetime license)
Type Browser-based Thunderbird add-on. Standalone desktop software.
Installation Must be installed inside Thunderbird. Installed independently, no Thunderbird add-on needed.
Thunderbird Version Compatibility Not compatible with all Thunderbird versions — issues reported on Thunderbird 91, 102, and 115. Supports all Thunderbird versions including 52, 60, 68, 78, 91, 102, and 115.
MBOX File Import Supports basic MBOX import, limited to Local Folders only. Imports MBOX into Thunderbird any profile: POP, IMAP, or Local Folder.
Wide Range of Support Does Not Support MBS, MBX and MailDir files. Support MBS, MBX, MailDir, EML, EMLX, MBOX files to Thunderbird import.
Bulk / Batch Import One file at a time. Import entire folders of MBOX files in one operation.
Attachment Import Frequently fails to import attachments: known issue. 100% attachment import including DOCX, PDF, ZIP, JPEG and multimedia.
Inline Image Retention Inline images often do not display after import. Inline images preserved in original format.
Email Header Preservation Partial: From, To, Subject may be retained but CC/BCC often lost. Complete header retention: From, To, CC, BCC, Subject, Sent Date, Received Date and Size.
Folder Hierarchy Maintenance Folder structure frequently gets lost or misplaced. Option to maintain exact source folder hierarchy or merge with existing folders.
Metadata Retention Read/unread status and email metadata often not preserved. Full metadata retention — read/unread status, flags, labels, timestamps.
Date Based Filter No filtering: imports all data regardless of date. Built-in date range filter: import only emails from a specific date range.
Auto-detect Thunderbird Profiles Manual profile selection required. Automatically detects all configured Thunderbird profiles.
Google Takeout MBOX Support Partial: large Takeout MBOX files (Inbox.mbox, Sent.mbox) often fail. Full Google Takeout MBOX support regardless of file size.
File Size Limitation Large MBOX files frequently cause crashes or timeouts. No file size limitation to import large size MBOX files to Thunderbird account.
Transfer Complete Thunderbird Profile Not designed for full profile migration. Moves complete Thunderbird profile to another computer including all MBOX and SBD files.
24x7 Customer Support Community forum only, no dedicated support. 24x7 free customer support with guaranteed response.
Best For Small MBOX files, simple import and single-file testing. Bulk migration, multiple file formats, enterprise use and data-critical imports.

Import All Items from MBOX to Thunderbird

Software Allows Users to Upload MBOX Files to Thunderbird Account

MBOX File Opera Mail MBS File SBD / MSF File
Body
  • Complete Message
  • Inline Image
  • Signature
  • Formatting
Attachment
  • DOCX / XLSX / PPTX
  • ZIP / PDF
  • JPEG / PNG
  • Multimedia Files
Header
  • From / To
  • CC / BCC
  • Subject
  • Sent Date
  • Received Date
  • Size / Time
Mailbox Folder
  • Unread
  • Received
  • Pinned
  • Drafts
  • Outbox
  • Sent
  • Spam
  • Deleted
Attachment
  • Documents
  • Images
  • Music
  • Video
  • Archives
Labels
  • Callback
  • Funny
  • Important
  • Meeting
  • Send Reply
  • To do
  • Valuable
  • Any user created label
SBD Source File As this is a sub-directory file, browse through it to find the MBOX file and import MBOX to Thunderbird using the software.
MSF Source File Since MSF file contains only the index, Browse to add related MBOX file to import MSF to Thunderbird.

Thunderbird Import Wizard - Noteworthy Features

Attributes That Make Import MBOX to Thunderbird Account Directly


Import MBOX to Thunderbird

Import MBOX to Thunderbird

The main function of this software is to add MBOX file into Mozilla Thunderbird account. Along with normal emails, the tool can also import MBOX file emails containing various attachments. Once the import is done, restart Thunderbird application to view and open MBOX file in Thunderbird that have been imported.

Move MBOX in Any Thunderbird Profile

Auto-Detect Thunderbird Profiles

Thunderbird Importer software automatically detects all the profiles that have been configured in the installed Thunderbird application. This includes both the POP and IMAP configured email accounts. Users can easily choose their target profile from the list and the software will move MBOX data to the chosen Thunderbird profile.

Support files

Import Bulk EML / EMLX Files

Thunderbird users can import large number of EML files into Thunderbird account using Thunderbird Import Wizard tool. For importation, the software supports EML / EMLX files created in both Windows and Mac OS email clients including Thunderbird, Windows Mail, Apple Mail, Entourage, IncrediMail, etc.

Support maildir

Move Maildir Files Directly

Along with MBOX file, Thunderbird also provides an option to save its data in Maildir format. In case you have some of these files that you wish to import into Mozilla Thunderbird, try Thunderbird Importer. The latest version of this software supports importing Maildir files into Thunderbird profile without changing its properties.

multiple MBOX file adding options

Add Single or Multiple Files

Import MBOX to Thunderbird tool offers users options to add one or multiple MBOX files to Thunderbird at the same time. It also supports other file formats i.e., EML / EMLX / Maildir.

  • Add Single File: This can be done with the help of Add File(s) option.
  • Add Multiple Files: To add multiple MBOX, EML, EMLX, Maildir files, users can choose Add File(s) options. They can also choose Add Folder option to add all supported files located in a folder at once.
  • Add Thunderbird Profile: Use Add Folder option to add the entire Thunderbird profile.

import mbox to thunderbird profiles

Import MBOX File into Chosen Thunderbird Profile

Along with the facility to add MBOX data into the default Thunderbird profile, Thunderbird Importer lets users move MBOX to Thunderbird other profiles.

  • POP Configured Account: Any POP configured account is suitable for MBOX file transfer by Thunderbird Import Wizard.
  • IMAP Configured Account: For IMAP configured account, import into the Local Folder and then drag and drop the imported folder to IMAP account.
  • Local Folder: Any MBOX file can be imported into the Local Folder of Thunderbird email.

Selective Data Import

Selective MBOX Data Import

The application will let users import selective data / emails from the added MBOX files into Thunderbird email application. Using the built-in date-based filter, users can enter the required date range by filling the From date and To date fields. Afterwards, the application will transfer the emails of only the particular date range to Thunderbird.

Thunderbird Importer Supported Email Clients

Supported Email Clients

MBOX files created in all the major email clients are supported by this MBOX to Thunderbird file importer software. The supported email applications include Thunderbird, Google Takeout, Google Vault, Opera Mail, Seamonkey, Netscape, Mulberry, Apple Mail, Entourage, Eudora, etc. This application is also compatible with Thunderbird Maildir files and EML files of all email clients.

Folder Hierarchy Retention of MBOX File

Maintain Folder Hierarchy

When you choose “Maintain Folder Hierarchy” option to import MBOX to Thunderbird account, the imported MBOX emails are saved in a new folder outside all the existing Thunderbird folders. When this option is not selected and a folder already exists with the same name as the MBOX file, the imported MBOX file data will get merged in that folder.

MBOX Metadata Retention

Retention of Source MBOX Metadata

Even after moving the MBOX files of different email clients into Thunderbird using Thunderbird Importer, there will be no changes in the metadata of the source MBOX file. Besides data integrity, the tool also keeps the header information, read/unread status, etc. intact after importing MBOX file to Thunderbird.

any size accepted for MBOX

No Restriction on File Size

When it comes to opening MBOX files into Thunderbird, the software is the perfect choice. Since there is no file size limitation, users can import MBOX files of any size to Thunderbird email using this tool. Even in case of large-sized MBOX files, Thunderbird Import Wizard works fine and moves files without any data loss.

Windows OS Compatible

Complete Windows OS Support

Thunderbird Import Tool is a Windows-based software that can be run on any Windows run computer / laptop. It is compatible with Windows 11 (64-bit), Windows 10, 8.1, 8, and 7 of this operating system. MBOX to Thunderbird import tool also supports 32-bit as well as 64-bit versions of Windows Operating System to add MBOX to Thunderbird account.

Thunderbird Import Wizard - Specifications

Best Software to Import MBOX File into Thunderbird Account Easily

best software

(Windows OS)

Name: SysTools Thunderbird Importer
Version: 5.2
Size: 10.3 MB
MD5: 2f01a33b6fe86028d57070384bfce018
Free Version: Download for Windows

(Mac OS)

SysTools Thunderbird Importer For Mac
8.1
34.1 MB
794599bf3f431625667ff29f80a5dd40
Download for Mac

Trial Limitations:		 (Windows)

Free Version of SysTools Thunderbird Import Wizard will only import 25 items per folder into Thunderbird Email Client.		 (Mac)

Free version of SysTools Mac Thunderbird Import Wizard will import first 10 emails per MBOX file. (For MBOX and MBX).
(Windows) (Mac)
Hard Disk Space: 100 MB of free hard disk space required 100 MB of free hard disk space required
RAM: 4 GB of RAM (4 GB is recommended) 4 GB of RAM (4 GB is recommended)
Processor: Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz Mac Computer with Intel Processor
Mac Computer with Apple Silicon (Apple M1)

Platforms:		 (Windows)

 Windows 11 (64 bit), 10, 8, 7 (32 bit or 64 bit) & Windows Server 2019, 2016, 2012 R2, 2008 Compatible with Microsoft Outlook 2000, 2003, 2007, 2010, 2013, 2016, 2019, 2021 (32/64 bit)		 (Mac)

MacOS X 10.8 (Mountain Lion), MacOS X 10.9(Mavericks), MacOS X 10.10 (Yosemite), MacOS X 10.11 (El Capitan), MacOS X 10.12 (Sierra), MacOS X 10.13 (High Sierra), MacOS X 10.14 (Mojave), MacOS X 10.15 (Catalina), MacOS X 11.0 (Big Sur), MacOS X 12.0 (Monterey), MacOS X 13.0 (Ventura), MacOS X 14.0 (Sonoma)

Application Pre-Requisites:

(Windows)

  • If you are using Windows 11, 10, 8, 7 (32 bit or 64 bit) & Windows Server 2019, 2016, 2012 R2, 2008, then please launch the tool as "Run as Administrator".
  • Microsoft .NET framework 4.5 or above should be installed.

(Mac)

Product Guide:

(Windows)

(Mac)

FAQs

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sanmbox to thunderbirdmachinemigration

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SysTools Thunderbird Import Wizard - Feature Comparison

Get An Overview of Free and Licensed Version of The Software

Features Free Version Full Version
Import Multiple MBOX Files into Thunderbird
Add Multiple MBOX/MBS, MBX, EML, EMLX, Maildir Files
Import Emails with Attachments
Selective MBOX Data Import
Maintain Source Folder Hierarchy
Complete Metadata Retention
Auto-Loading Thunderbird Profile
Support for Windows OS 11 & all older versions
Import MBOX to Thunderbird 25 Items / Folder
Also Support EML, EMLX, and Maildir Files 25 Items / Folder
Cost FREE Starting At $29

Awards & Reviews

Best Software to Import MBOX Files into Thunderbird Account

MVPs & Expert Reviews

See What Experts & MVPs Say About This Tool

Frequently Asked Questions

Import MBOX to Thunderbird with Complete Data

Question Answer
Q :

How do I import MBOX files into Thunderbird?

I am planning to buy this Thunderbird Importer software. Can you tell me how to import MBOX files using this application?

 It is quite easy to operate this tool. All you have to do it to follow these steps:
Steps to Import MBOX Files into Mozilla Thunderbird
  • Step-1: Launch Thunderbird Import Wizard on Windows computer
  • Step-2: Click on Add File / Add Folder to add MBOX/MBS, MBX, EML, EMLX, Maildir files.
  • Step-3: Choose "All Mails" for complete data import in Thunderbird. Choose Mails -> Apply Filters -> Set to import selective MBOX items based on date-filter
  • Step-4: Select desired Thunderbird profile from Select Identities list
  • Step-5: Click on Import to import MBOX to Thunderbird.
Q :

Why does not Thunderbird display imported MBOX, EML, EMLX, Maildir files?

 If your Thunderbird program is open during the import process, then you have to close it and start again to view the imported MBOX, EML, Maildir data.
Q :

Why cannot I import MBOX to Thunderbird profile using this tool with Thunderbird setting set as maildir?

 If you cannot find the transferred MBOX data in Thunderbird, check the Advanced Configuration settings of your Thunderbird account. The Message Store type has to be set as MBOX for this tool to work. If it is set as Maildir, the import will not be successful.
Q :

How do I open an MBOX file in Thunderbird?

 Download free Thunderbird email application and import the MBOX file into it with Thunderbird Importer software. Then you can easily open an MBOX file.
Q :

What is the maximum file size for MBOX file supported by this software?

 There is no file size limit as users can add any size of MBOX file to this Thunderbird Import Tool.
Q :

Does this application support importing Opera Mail MBS file to Thunderbird?

 Yes, MBS file created in Opera Mail is a type of MBOX file. This tool can be used to import MBS file also.
Q :

How to import MBOX files into Thunderbird IMAP configured account?

 When users choose the IMAP profile as the destination, the tool will show a warning message and ask users to choose Local Folder as their destination. When the data transfer is done, MBOX file data can be easily dragged from Local Folder section to IMAP account.
Q :

How to import a bulk amount of EML / EMLX files into Thunderbird?

 Store all the necessary EML / EMLX files in a folder and use Add Folder option of Thunderbird Importer to add the folder into the tool. Then the application will import all the EML, EMLX files into Thunderbird regardless of its count.
Q :

Is there any chance of data loss while importing some MBOX files into Thunderbird?

 No, the software carefully moves complete data of MBOX files in Thunderbird and no data will go missing in this process.

What Customers Are Saying

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