Transfer | Convert IncrediMail to Thunderbird [Hassle-Free]

Rollins Duke
Published: August 7th, 2026 • 5 Min Read

IncrediMail officially shut down on March 20, 2022. If your IncrediMail still stores multiple emails, folders, contacts & calendar, then you need to switch them to trusted email client. In this blog, users get to know direct method to convert IncrediMail to Thunderbird without losing mailbox structure. This blog provides free & automated solution to import IncrediMail folders & mailboxes to Thunderbird. Let’s continue to know full guide—

Benefits of Converting IncrediMail to Mozilla Thunderbird

As we know, IncrediMail stopped providing email service in 2020. If users need access to their emails, then they need to switch first access later. Let’s know more reasons for converting IncrediMail account to Thunderbird.

Mozilla Thunderbird regularly updates new features, security updates & bug fixes.
Thunderbird supports modern authentication methods so users can easily access older emails.
It allows users to store & manage their mailbox data locally.
Users get cleaner & easy-to-understand interface than IncrediMail.
Access multiple accounts in single place with advanced search feature.

Freely Convert IncrediMail to Thunderbird [Easy Tricks]

Use do-it-yourself method if users don’t want to spend money on free method. This method didn’t charge single penny to convert IncrediMail to Thunderbird.

In first step, Open IncrediMail on your computer.
Go to Tools & choose Options.
After that, go to Advanced & click Data Folder Settings.
Once reached there, note location of IncrediMail data folder.
Close to IncrediMail.
Open IncrediMail data folder & find mailbox files.
Use IMM-to-EML extraction tool to extract emails into EML format.
Install & set-up Thunderbird.
Now search & add “ImportExportTools NG” extension in Thunderbird.
Right-click Thunderbird folder to save imported emails.
Click ImportExportTools NG & select import EML files option.
Import all messages from directory option.
Select folder that has extracted EML files.

Quick Advice: This method is good if you have small amount of email data. To operate this method users need to install Thunderbird & IncrediMail to complete conversion. It also requires technical knowledge & time to complete process. In this method users only convert IncrediMail emails to Thunderbird not calendars & contacts.

Pro Solution: Convert IncrediMail to Thunderbird (With Contacts)

If users don’t want to face hassle then they can choose or download BitRecover IncrediMail Converter Tool to convert IncrediMail files into Thunderbird account. This tool directly converts IncrediMail files without losing contacts. It provides option to automatically choose or manually browse IncrediMail files. Users also get multiple advanced filter features that make conversion process simpler & more accurate. Download free demo edition of this application to know more about the software.

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Step-by-Step Process to Migrate IncrediMail to Thunderbird

Run IncrediMail Converter software
Choose configured IncrediMail data files or select IncrediMail files/folders.
Preview IncrediMail Email folders listed. Click on Next.
Choose Thunderbird as a saving option and hit Next button.
Start conversion process.

Why Choose IncrediMail to Thunderbird Converter? (Features & Benefits)

Effortlessly select & convert IncrediMail data to Outlook, Gmail & Mozilla Thunderbird. This application offer two way to choose IncrediMail data such as “Select File & Select Folder”.
It supports migration from both IncrediMail 2.5 & IncrediMail 2.0 to Mozilla Thunderbird.
Directly import IncrediMail CAB, IMM, and IML files into Thunderbird. It provide comprehensive compatibility with different IncrediMail file formats.
Users can check/uncheck IncrediMail file as per their requirements.
Provide complete preview of IncrediMail file before begin conversion process.
Extract & save IncrediMail contacts to VCF format without losing any information.
This tool provides live conversion progress report that helps to understand error & success of conversion.
A free demo edition also comes with this software that freely convert first 25 emails from IncrediMail to Thunderbird.

Got Questions? We’ve Got Answers

How to Import IMM, IML, & CAB files into Thunderbird?

Firstly, choose professional solution. After that, users just need to click “convert configured IncrediMail mailbox data,” and this tool automatically select entire mailbox. Once selected Thunderbird is set as saving option to directly save IncrediMail files in Thunderbird mailbox.

Will My Emails & Attachments Remain Safe or Altered?

No, your email attachments remain safe, if users convert IncrediMail to Thunderbird via automatic solution.

Can I Transfer IncrediMail Contacts to Thunderbird?

Yes, this tool allows users to export IncrediMail contacts in vCard format. This tool easily converts IncrediMail contacts without losing them when users converting IncrediMail to Thunderbird.

Does this tool provide preview Before Conversion?

This application provide free preview before conversion. In this feature users also get feature to check/uncheck to select IncrediMail files.

Writer Last Note

In this blog, users get to know simple method to convert IncrediMail to Thunderbird. First method required lot of email client setup & time to complete conversion process. On the other hand, users also get professional solution that provide direct method to export IncrediMail to Thunderbird without any email client. If users are still stuck in any situation during conversion process then they can contact support team, which is always available to help them. Pick any technique that meets your specifications.