How Can I Back Up Thunderbird Emails Safely?

[sharmahrsh137]

Hi everyone,

I have been using Mozilla Thunderbird for managing my emails and now I want to create a complete backup of my Thunderbird emails before moving to another computer. I have a large number of emails stored in different folders, along with attachments, so I want to make sure the folder structure and email data remain intact.

I know Thunderbird stores mailbox data locally, but I am looking for an easier way to back up the emails and save them in formats that can be accessed later.

Has anyone used a Thunderbird backup tool for this? I came across the SysTools Thunderbird Backup Tool, which supports backing up Thunderbird emails and exporting them into formats such as PST, MBOX, EML, MSG, and PDF.

I would appreciate recommendations from anyone who has tried it or has another reliable method for creating a Thunderbird email backup.

[davidmithen]

The safest way to back up Thunderbird emails is to keep the original Thunderbird profile unchanged and create a separate copy before migration or conversion.

• For a basic backup: copy the Thunderbird profile/MBOX data to another drive and keep the original as a recovery copy.
• For a large mailbox: batch export can make the backup easier to access and manage.
• Before exporting: preview important emails and check attachments, headers, and folder structure.
• For wider access: save Thunderbird emails as PST, EML, MSG, HTML, or EMLX depending on where you need to use the backup.

For bulk Thunderbird email export, Softaken Thunderbird Converter supports batch processing, attachments, folder hierarchy, preview, and selective filtering, so you can review the data before creating the backup.

[sarahbennett24]

You can back up Thunderbird emails safely by copying your Thunderbird profile folder to an external hard drive or another secure location. This protects your emails, folders, account settings, and other profile data.

Method 1: Back Up Thunderbird Emails Manually

Open Mozilla Thunderbird.

Go to Help > Troubleshooting Information.

Find the Profile Folder section and click Open Folder.

Close Thunderbird completely.

Copy the entire profile folder to an external hard drive, USB drive, or another secure location.

This method saves your emails along with your account settings and other profile data.

Method 2: Export Emails Using ImportExportTools NG

You can use the ImportExportTools NG add-on to export individual email folders in MBOX format.

Install ImportExportTools NG in Thunderbird.

Right-click the folder you want to back up.

Select the export option.

Choose MBOX format and save the file to your preferred location.

Method 3: Use Advik Thunderbird Backup Tool

If you want to save Thunderbird emails in different formats, you can use Advik Thunderbird Backup Tool. It allows you to export mailbox data into formats such as PST, MBOX, EML, and PDF for backup or migration purposes.

Tip: Keep multiple copies of your backup in separate locations and periodically check that your saved emails can be restored.

[gloris]

When backing up Mozilla Thunderbird email profiles manually, copying the local directory (%APPDATA%\Thunderbird\Profiles\) can lead to corrupt or incomplete backups if Thunderbird or any associated background processes are active during copy operations.

Furthermore, manually copying profile folders binds the saved messages to raw MBOX files, .mozmsgs folders, and .wdseml search index files, which are tedious to extract or restore to alternative platforms.Manual profile archive attempts often introduce significant issues:Locked MBOX Files & Data Loss: If Thunderbird is open or indexing in the background, active locks on .default-release files cause database table mismatch errors or missed incoming mail streams.Corrupted Index/Search Tables:

Transferring raw MBOX structures across platforms without clearing local .msf index files causes corrupted folder trees and inaccurate search results.Complex Multi-Platform Restore Paths: Extracting messages into generic formats (like .eml or .pdf) requires manual add-ons like ImportExportTools NG, which frequently crash when parsing multi-gigabyte mailboxes.

BitRecover Thunderbird Backup Wizard simplifies this process by bypassing manual profile lookup and locked file errors. It features an automated profile detection engine that reads default and custom .default-release directories directly offline. The utility exports complete mailboxes, address books (.csv), and calendar items (.ics) into over 30 standardized file and document formats (PST, EML, PDF, MBOX, etc.) while preserving complete header metadata and maintaining exact folder taxonomies.