Can I import multiple MBOX files into Thunderbird at once?

Yes, with this Thunderbird import tool users can effortlessly select and import multiple MBOX files into Thunderbird in one go without much hassle.

Does this tool support and import large email messages into Thunderbird?

Yes, there is no file size limitation with this Thunderbird import tool. Users can seamlessly select the desired files and import them into Thunderbird. However, the free demo edition supports only the first 25 emails from each folder for import.

Does this Thunderbird email import tool support attachments?

Yes, this Thunderbird importer ensures data integrity and preserves attachments, folder hierarchy, email attributes, and other mailbox elements during the import process.

Can I import mailbox files from any email client into Thunderbird with this tool?

Yes, the tool allows users to import mailbox files from various email clients and services including Gmail Takeout, Eudora Mail, SeaMonkey, Netscape Mail, The Bat, Mac Mail, and many others directly into Thunderbird.

Can I customize my Thunderbird Import Tool?

Yes, custom features can be added to the Thunderbird Import Tool, such as Duplicate Email Skipping, Merge Folder Structure, and Complete Preview Option. Users can contact the support team through Live Chat to discuss customization requirements.

Thunderbird Import Tool to Replace ImportExportTools NG

Why Choose BitRecover Thunderbird Importer?

There are a number of reasons that make it the best Thunderbird import tool. Some uniqueness of this utility that makes it the best fit to import mailboxes to Thunderbird are listed below.

Support Every Attribute

This Thunderbird ImportExportTools NG alternative makes sure that every attribute of the emails or mailbox is imported correctly. It includes hyperlinks, a header, footer, multimedia, attachments, and so on. This makes sure that no data loss or alteration takes place when the user proceeds to add mailbox messages to Thunderbird.

Fast & Secure

The import export tools Thunderbird is very fast to import large mailboxes files as compared to the add-on ImportExportTools NG, which has lots of restrictions. Also, it is 100% safe and secure to share sensitive files to add in Thunderbird account with complete privacy and data integrity.

Dedicated Support

Unlike any other Thunderbird import services provider, we provide around-the-clock assistance to users who feel stuck during the process of Thunderbird import messages files. Thus, whether they have a query related to pricing, installation, advanced features, services, or more, they can connect to the expert for quick resolution.

Prominent Features of Thunderbird Importer

Some of the main highlights of this Thunderbird ImportExportTools NG alternative are mentioned in this section.

Limitless Import in Thunderbird

BitRecover Thunderbird Import Wizard has been tested to import over 115 GB of messages in Mozilla Thunderbird in one go. All-restriction free data import in Thunderbird - bulk import multiple files & folder with any number of emails & mailbox size.

Dual Options to Select Mailboxes

Thunderbird Import tool has dual options to load mailboxes from a Windows computer. Choose the "Select Files" option if you want to add a single mailbox file to Mozilla Thunderbird, and choose the "Select Folders" option if you want to import the whole folder that has multiple mailbox files in Thunderbird.

Compatible with the Latest Thunderbird

BitRecover Thunderbird Importer Software is very compatible since it supports all Thunderbird editions, such as 153.0a1, Beta Release 152.0, Monthly Release 151.0.1, 140.0, 115.0, 102.0, and all earlier versions. So, there is no need to think about which version of Thunderbird the user is currently using. Thus, in the end, it boosts user productivity and even allows the user to import old emails to Thunderbird swifter.

Supports All Mailbox File Variants

This Mozilla Thunderbird Import Tool is an advanced utility that is compatible with all mailbox file variants, such as MBOXO, MBOXRD, MBOXCL, MBOXCL2, etc. It also supports different types of mailbox files having *.mbox, *.mbx, *.mbs, and without extension mailbox files. It even supports Thunderbird SBD (Sub Directory) and MSF (Mail Summary Files) to add multiple emails to Thunderbird.

Supports Mailbox of Many Email Clients

Thunderbird Importer supports mailbox files created and exported from Eudora Mail, Apple Mail, Mac Mail, Gmail Takeout, SeaMonkey, Netscape Mail, The BAT, etc., so that users can import different email client mailbox files to Thunderbird without manipulating the original data. This makes this tool versatile and a one-stop solution for Thunderbird import message mailboxes from folder utility.

Exact Upload in Thunderbird Local Folder

The tool preserves every single bit of email information when importing data into Thunderbird local folders in Windows such as message body, attachments, email headers- CC/BCC, Time Stamps, read unread status, sender & receiver details formatting, signature & hidden metadata as well.

Automatic & Standalone Thunderbird Importer

The tool auto detects the Thunderbird profile location from your computer without the need of manually entering the path and can even work without needing active or working Thunderbird installation.

Fully Secure & Offline Import

The tool does not require internet connection to upload mailboxes into Thunderbird. Your data remains entirely local with complete compliance with HIPAA, CAPA & GDPR. The tool has been awarded by many software listing companies for total virus-free & secure import.

Separate Folders for Each Mailbox

Thunderbird Import Software automatically creates a separate folder in the Mozilla Thunderbird email client so that users can easily find the resultant imported data. This application also creates separate subfolders for each mailbox file in the Thunderbird configured profile. Thus, organizing and managing the output of Thunderbird mailbox data import becomes more manageable.

Multilingual Product Setup Instructions

Thunderbird Importer can be installed in various international languages such as English, Deutsch, Français, Italiano, Nederlands, etc. Users can choose any specific language during installation of the product so that they can more comfortably add multiple emails to Thunderbird.

Advance Filter Option

This Thunderbird importer tool also has a dedicated tab with advanced filtration options. It allows the user to add mailboxes in Thunderbird specifically or in a decluttered way. Some of the filters are date range, excluded folder, from, to, subject, root folder, and more. The user just needs to tick selected filters to apply them and get a decluttered output from Thunderbird import tool accordingly.

Best ImportExportTools NG Alternative

In case the Mozilla Thunderbird ImportExportTools NG is not working, then it is advisable to use BitRecover Thunderbird Importer because it successfully deals with all errors and provides 100% clean results after completing the Thunderbird file adding process. Also, unlike the Thunderbird ImportExportTools NG add-on, there is no file-size and speed limitation with this utility.

Additional Benefits of BitRecover Thunderbird Import Tool

Import Tracking

Seamless Import Tracking

When importing messages in Thunderbird the tool displays live upload status and auto-generates a SavingLog.txt report with status, error & other details for tracking & audits.

Encryption & Corruption Handling

Imports encrypted and corrupted mailbox files into Thunderbird automatically, the tool detects issues mid-process and resumes without data loss or manual intervention.

Preview Folder Structure

You can preview the mailbox structure and select the mailboxes that you want to add in Thunderbird for viewing, restoration, and archival needs.

Free Thunderbird Import Wizard

Download the free trial and test BitRecover Thunderbird Import Wizard — no credit card, no time limit, no commitment. The trial is fully functional with the same speed and interface. The only limit is 25 emails per folder. Upgrade when you're confident it works.

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Criteria	ImportExportTools NG (Add-on)	BitRecover Thunderbird Import Wizard	Native Import Tool
Mailbox Import Limit	Limited to 4 GB of import	No import size restrictions	Practical limitation of 8 GB
Require Thunderbird Installation	Yes – will not work with an inaccessible profile	No – standalone tool to import data into Thunderbird in any scenario	Yes
Selective Email Import in Thunderbird	No dedicated option available	Smart filters based on date range, To, From, and subject keywords	For complete profile import only
Data Type Support	MBOX from Thunderbird-based architecture	Any MBOX, SBD, profile folder, or file from any email client or service	Only MBOX ZIP backups exported from Thunderbird
Errors & User Complexity	High risk of failure – greyed-out options and compatibility issues	Easy to use with minimal errors	File validation errors
Speed & Time	Slower import (approx. 1 GB in ~15 minutes)	Imports 1 GB of data into Thunderbird in ~5 minutes	Can take up to 1–2 hours for complete import into a Thunderbird profile
Data Integrity	Metadata, email formatting, folder structure, and attachments are often lost	Extracts data while preserving complete integrity	Complete data integrity is maintained
Cost	Free	Free trial / $29 full version	Free

Industry Standard Thunderbird Import Tool

Trusted by Over 5,000 Users and Recommended By Global Experts & Software Platforms

Microsoft Marketplace

Microsoft

Recognized and supported on the Microsoft platform — BitRecover Thunderbird Import Wizard meets Windows application standards for security, performance, and compatibility.

SoftwareSuggest

Top rated Thunderbird Import Software on SoftwareSuggest for its simplicity, ease of use and wide compatibility with all Windows devices.

CNET

Import messages in Thunderbird with fast speed with BitRecover. Also available on CNET - a go-to destination used to access trusted software for everyday needs.

Software Informer

Trusted for being completely virus-free and secure offline application. Globally used by both government and private organizations for its security & compliance standards.

Specifications of Thunderbird Importer Tool

Know the Minimum System Specifications to Install and Work with the Thunderbird Import Tool.

Software Download

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File Size : 68.8 MB

Version : 4.0

Trial Limitations

As the tool provides a trial edition so, users can import only 25 email messages into the Thunderbird email client. To import unlimited Thunderbird email messages, users need to buy a licensed edition.

System Specifications

Hard Disk Space
150 MB of free hard disk space

RAM
Minimum 4 GB RAM

Processor
Intel® Pentium 1 GHz processor (2.4 GHz is recommended)

Supported Editions

Microsoft Windows – Windows OS 11 (64 bit), 10 (32 bit or 64 bit) & Windows Server 2025, 2022, 2019, 2016
Mozilla Thunderbird – Thunderbird Daily Release 153.0a1, Beta Release 152.0, Monthly Release 151.0.1 & ESR Release 140.12.0, including all previous Thunderbird versions.

Product Guides

Electronic Delivery

The product delivery is automated. You will receive an email with the link to download the product and the activation key within a few minutes after the payment has been confirmed.

Features	Trial Version	Full Version
Dual Options to Select Emails
Import Selective Folders
Multiple Language Options
Offers Advanced Filters
Import Unlimited Emails	25 Emails Each Folder	Unlimited
Cost	Free	$29

FAQ For Thunderbird Import Tool

Find the Answers to All Your Questions Related to Thunderbird Import Tool working.

Ans:Yes, with this Thunderbird import tool user can effortlessly select bulk data to add in Thunderbird in one go without much hassle.

Ans:There is no file-size limitation with this Thunderbird import tool. Hence, one can seamlessly select the desired files and import them to Thunderbird. However, the free demo edition supports only the first 25 emails from each folder to import in Thunderbird.

Ans:This Thunderbird importer ensures data integrity and thus, ensures that attachments, folder hierarchy, attributes and other elements stay the same when the Thunderbird import tool generates the output.

Ans:Yes, the tool does not impose any restriction on the number of emails, mailbox size or the number of mailboxes you can import in Thunderbird.

Ans:Yes, the tool lets you import mailboxes from any email clients and services such as Gmail Takeout, Eudora Mail, SeaMonkey, Netscape Mail, The Bat, Mac Mail, and more into Thunderbird.

Ans:Yes, you can add custom features to the tool such as - Duplicate Email Skipping, Merge Folder Structure, or a Complete Preview Option by getting in touch with our support team via the Live Chat.

Client Testimonials - Thunderbird Import Tool

Here is what our loyal customers have to say about our advanced yet easy-to-use Thunderbird Importer.

Jimmy Corbett

USA, Tech Entrepreneur [2025]

I am using BitRecover Thunderbird Import Wizard instead of ImportExportTools NG for the past year. It is helping me to import mailbox data to Thunderbird directly in the TB profile. In my organization, all employees are using Mozilla Thunderbird for sending and receiving email messages. So, it is our routine task to add shared / additional mailbox to TB.

Brown Johnson,

London, Personal Use [2024]

Thank you BitRecover for launching this useful software. I was in confusion using ImportExportTools NG Add-On for importing mailbox files into Thunderbird. Then I found your software with the help of Google. According to me, it is a highly recommended Thunderbird importer that comes with an easy graphical interface and provides 100% satisfaction each time.

David Cooper,

Spain, System Admin [2025]

Tried Thunderbird ImportExportTools NG to transfer my mailbox messages in Thunderbird but it was very slow and even corrupted some of my important emails. That is why one of my seniors suggested me this tool. It is easy to use, gives accurate reports, and has lots of advanced features which make the process of adding email data to Thunderbird efficient.