Thunderbird Migration Tool to Easily Move Thunderbird Emails

Why Use SysTools Thunderbird Migrator?

This Software Helps You in Various Scenarios

Handle Large Mailbox

This software is capable of batch migration, so whether you are moving to your small inbox or an enterprise account with hundreds of thousands of emails. It easily moves them with minimal downtime and preserves folder structure.

Preserve Original Email and Metadata

It strictly maintains your Thunderbird folder structure throughout the migration process. Along with it, all your emails with metadata like To, From, CC, BCC, Sent/Received Dates, and other properties are 100% intact.

Selective Email Migration

Thunderbird migrator not only transfers bulk mailboxes, but also allows selective migration. In the Workload section, you can apply a Date Filter where you set a date range to sort out your emails. If you are moving multiple users' mailboxes, then you can select which mailbox you want to transfer on the Migration dashboard. These options will help you to easily transfer specific emails precisely.

Complete Thunderbird Migration with Attachment

It transfers the entire Thunderbird mailbox to another, including the email attachments. Any file (PDFs, documents, images, zip files, etc.) attached to the email will easily and safely move to your destination without reducing the quality of the file. This is why many professionals prefer our tool for their work account transfer.

Secure Account Data and Credentials

To transfer your emails, you need to add account credentials. Our tool will keep all your sensitive data safe. We strictly don't misuse your data. Also, it supports modern authentication for configuring your account.

A User-Friendly Interface

Thunderbird Email Migration has a simple, minimal and beginner-friendly GUI. Therefore, non-technical users and IT administrators can easily work with the software and migrate their mailbox within a few clicks. There is less of a learning curve.

Discover Key Features of Thunderbird Migration Tool

This Utility Offers Amazing Features to Migrate Thunderbird Emails

Migrate Thunderbird to 100+ Emails

This software is especially created to transfer your Thunderbird mailbox to multiple email accounts, servers, and clients that support the IMAP protocol. In addition to that, it also allows you to migrate to a custom domain. Therefore, this software can perform Thunderbird personal to personal account, personal to professional, professional to professional, professional to personal, etc.

Date Filter for Selective Migration

It supports both bulk and selective migration. The Date Filter is a very useful feature for users where they can transfer their old emails or some specific emails on a particular date. Here, you have to set a date range, and the software transfers only those emails within the date range.

Confirm Account Permission

In order to migrate your emails, you have to confirm that your Thunderbird and the destination account must have suitable permissions. This is done when you are choosing your source and destination IMAP server. A Validate button is shown, which confirms that your server provides you with the required validation. After importing your source and destination user IDs, you have to validate them to begin the process.

CSV User ID Mapping

To accurately transfer your mailbox from Thunderbird to the destination, you have to submit a CSV file containing source IDs and destination IDs. It provides two options:

Download Template: First download the sample CSV file.
Import Users: After adding the information, save the file and submit it to the tool.

Set User Priority

There are some critical user emails that you urgently need. For this, you can make those user accounts a priority by clicking the star icon next to the user ID. This tells the utility to transfer the priority account first and then the rest of them.

Re-Run Migration Facility

After the initial process, there are some emails that are not transferred. For this, the tool offers you three options:

Retry Failed Items: Re-transfer those items that failed to migrate.
Full Re-Run Migration: Complete re-run migration and move only failed items.
Delta Migration: Transfer newly added emails from the already transferred mailbox.

Create Report for Future

After you have properly migrated your emails, the software allows you to generate a report. Click on the Report and choose the option: Summary or Detailed Report. It will create one with the information about the process. You can download this to your local drive as a CSV.

Free Software for Testing

You don't need to purchase the Thunderbird Migration Tool first to move your emails. We prepared a demo version that you can download for free and contains all the features of the tool. Use it to check how this software works, and if everything is fine for you, you can buy the paid version. But remember, the demo version only transfers 100 emails from the first five folders of a user account.

Specifications to Download Thunderbird Migrator

Preparations to Download and Install Software on Your Machine

(Windows OS)

Name:	SysTools Thunderbird Migration Tool
Version:	7.4
Size	162 MB
MD5:	35f422f64f6a775298d4b49cc2254ef0
Delivery:	Free via Email
Free Version:	Download for Windows

(Mac OS)

SysTools Mac Thunderbird Migration Tool

7.4

227 MB

d54fd668086739247746a97ece89e890

Free via Email

Download for macOS

Trial Limitations:

(Windows)

Demo version will process 100 items of email from the first 5 folders of the selected user account.

(Mac)

Demo version will process 100 items of email from the first 5 folders of the selected user account.

Hard Disk Space:

(Windows)

Around 500 MB for installation, and the Tool requires at least 20 GB of free space to store data.

(Mac)

Disk Space: For installation, around 1 GB of free space is required, and the Tool requires at least 5 GB of free space to store data.

RAM:

8 GB RAM

8 GB is recommended

Processor:

Minimum 8 core Processor

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

Platforms:

(Windows)

Windows Server 2016
Windows Server 2019
Windows Server 2022
Windows Server 2025
Windows 10 64-bit
Windows 11 64-bit

(Mac)

macOS X 11.0 (Big Sur)
macOS X 12.0 (Monterey)
macOS X 13.0 (Ventura)
macOS X 14 (Sonoma)
macOS X 15.0 (Sequoia) and above versions.

Application Prerequisites:

(Windows)

Microsoft .NET Framework v4.8.0 should be installed.
Microsoft VC++ Redistributable should be installed.

(Mac)

IMAP should be enabled for the source and destination platforms.
Use the app password to log in to SysTools Thunderbird Migration Software.
Know how to enable IMAP and create an app password

Product Guide:

(Windows)

(Mac)

FAQs

online antivirus software process
disable temporarily whitelist Verified tool

output destination
source
scan migration machine migration file

Electronic Delivery

delivery automated email
download online activation payment

Features	DEMO Version	FULL Version
Allows Transfer of Thunderbird Emails to Multiple Accounts
Your Original Message, Metadata and Attachments Preserved
Allows Incremental Migration
Provides Re-Run Migration Options
Generate Summary & Detailed Report
Set User Priority
Supports from Technical Experts	Standard	24/7 Priority Support
Transfers Multiple Thunderbird Emails	First 100 Emails per folder	Unlimited Emails All Folders
Price	FREE	$25

Most Commonly Asked Questions for Migrating Thunderbird Emails

Let's See What Others Ask When Transferring Mailbox

Q. How can I migrate Thunderbird emails to another email account?

It is simple; follow the steps below:

Step 1: Start by downloading and installing the software.
Step 2: Select the IMAP option as the source and destination. Then, click the Next button.
Step 3: Choose Thunderbird from the source IMAP server list. Validate your account.
Step 4: Select any destination and validate your account.
Step 5: Add your source and destination email addresses.
Step 6: Set user priority and Start Migration.

Q. Can I transfer Thunderbird emails to Office 365?

Yes, definitely. This software is created to migrate Thunderbird emails using IMAP, so migrating Thunderbird emails to Office 365 is absolutely possible and easy.

Q. I have been using my Thunderbird for 8 years and am now switching to a new email account. Can I move my 8-year-old emails to a new email account?

Our tool helps you to migrate old emails with the help of the Date filter. Set your date to 8 years old and move your emails.

Q. Will my folder hierarchy be preserved when using the software?

Yes, the software focuses on preserving your folder hierarchy, original email message, metadata, and attachments during the migration.

Q. Does Thunderbird Migration Tool also transfer attachments?

The software is created to move a complete mailbox from Thunderbird to destination, including your attachments.

Q. Which type of IMAP services can I migrate Thunderbird emails to?

You can easily move your Thunderbird emails to variety of email services like Gmail, Outlook, Microsoft 365, Google Workspace, Yahoo, Gmail, etc. even a custom domain.

Q. Do I need to install Mozilla Thunderbird before using the software?

No, this is an independent software that does not require the installation of Thunderbird to transfer your emails.

Customer Reviews of Thunderbird Migrator

What Users Say About the Software After Using It

I was struggling to move my Thunderbird emails to Gmail. I tried the manual method, but it is not a straightforward process. My colleague suggested this software to me, I was skeptical at first, so I tried the demo version. After trying the software, I was impressed, how easily it transferred my emails correctly.

Michael Micmahon
Network Administrator, United Kingdom

I needed to transfer only emails from my past two years. The date filter of the software worked so well that it reduced the migration time and exceeded my expectations.

Linda James
Small Business Owner, United States