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When Do Users Use the Thunderbird Backup Tool?

Common situations where a Thunderbird email backup can help protect, preserve, or move your mailbox data.

Moving to a New Computer

Getting a new laptop or desktop does not mean leaving your old Thunderbird emails behind. Back up your Thunderbird profile before moving to the new system and keep your emails, folders, and attachments available when you need them.

Moving from Thunderbird to Outlook

Thunderbird stores mailbox data in MBOX, while Outlook uses PST. When users switch between these two email clients, they need to convert Thunderbird mailbox to PST. This makes it easier for them to use their existing emails and folder structure in Outlook, without any need to start all over again.

Migrating Thunderbird Mail to Microsoft 365

Organisations often migrate Thunderbird data to Microsoft 365. As a result, they move years of Thunderbird emails along with attachments to the supported M365 destinations.

Backing Up Before Windows Reinstallation

Reinstalling Windows without first securing locally stored Thunderbird data can leave important emails unavailable. Create a separate backup of Thunderbird profiles and export emails to formats such as PST, EML, MSG, MBOX, PDF, or CSV.

Archiving Old Thunderbird Emails

Keep older Thunderbird correspondence accessible even when it is no longer needed in the active mailbox. Export emails to PDF, PST, MBOX, EML, or MSG for long-term storage, review, or future use.

Large Thunderbird Mailboxes

Large Thunderbird mailboxes can be difficult to store and transfer as a single file. Split MBOX output into smaller files based on the required size, or merge multiple MBOX files when a consolidated backup is more convenient.

Securely Authenticate Your Thunderbird Account

Use an appropriate authentication method to connect Thunderbird data to your selected email destination.

Microsoft 365
Microsoft 365

Export Thunderbird mailbox data to Microsoft 365 using Modern OAuth or Impersonation for administrator-managed mailbox access and bulk migration.

  • Client ID
  • Client Secret
  • Tenant ID
  • Admin Account

Azure AD app setup guide

Google Workspace
SharePoint

Authenticate the destination using a Service Account JSON key with the Workspace administrator account and Domain-wide Access for mailbox mapping and migration.

  • JSON Key
  • Admin Account ID
  • Domain-wide Access

Generate a JSON key

Gmail
OneDrive

Connect Thunderbird data to Gmail using OAuth 2.0 or app authentication, depending on the selected authentication method.

  • OAuth 2.0
  • App Authentication
  • Client ID + Secret

Generate Client ID & Secret

IMAP
OneDrive

Connect to supported IMAP servers using the required server details and secure connection settings.

  • Host + Port
  • SSL
  • App Password

Enable IMAP in settings

GoDaddy
OneDrive

Connect GoDaddy mailboxes through the Microsoft 365 authentication flow using the verified account details.

  • Microsoft 365 Auth
  • Email Address

Uses Microsoft 365 flow

Outlook.com
OneDrive

Connect Outlook.com accounts through the Microsoft 365 authentication flow using the required verified email address.

  • Microsoft 365 Auth
  • Email Address

Uses Microsoft 365 flow

Advanced Backup Filters & Options: Aryson Thunderbird Backup Tool

Use the appropriate built-in filter to migrate only the relevant data & increase the processing speed.

date-range-filter

Date Range Filter

Back up emails from a specific start and end date instead of processing the entire Thunderbird mailbox. This helps users focus on recent, project-specific, or required emails and avoid creating unnecessarily large backup files.

removes-duplicates-mail

Duplicate Email Detection

The software finds out duplicate e-mails by utilizing existing mail headers—'To',' 'From', 'Subject', 'Body' and 'Cc'. It thus reduces unnecessary information stored in backups and makes exported mailboxes even neater.

attachment

Attachment Handling

Choose how attachments should be handled during backup. Users can include attachments with their emails or exclude them when only the email content is required, helping control backup size and storage usage.

skip

Skip Previously Exported Data

Skip data that has already been exported during an earlier backup operation. This is useful when running repeated backup jobs because users can avoid processing the same mailbox content again and save processing time.

advanced

Search & Advanced Search

Search the Thunderbird folder hierarchy and narrow down email data using available To, From, and Subject criteria. This makes it easier to locate specific mailbox content before selecting it for backup.

folder

Preserve Folder Hierarchy

Maintain the original Thunderbird folder and subfolder structure in the exported data. Emails remain organized according to their source folders, making the backup easier to browse and manage later.

merge-files

Merge MBOX Files

Combine multiple MBOX files into a single MBOX output when you need to consolidate Thunderbird mailbox data. Moreover, you can merge MBOX files based on file size (MB/GB). This can make several mailbox files easier to manage as one backup.

split

Split Large PST/MBOX Files

Split MBOX/PST output into smaller files based on the selected file size (MB/GB). This helps users manage large Thunderbird backups more conveniently and makes individual output files easier to store or transfer.

add-custom-volume

Custom Output Location

Select the folder where the Thunderbird backup files should be saved. This gives users control over backup organization and makes it easier to store exported data on a preferred local drive or storage location.

naming-convention

Custom File Naming

Apply available naming options to supported output formats such as EML, MSG, and PDF. This helps users organize exported emails using meaningful names and locate individual messages more easily after backup.

over-size

PDF Size Restriction

Control the size of generated PDF output, with the documented limit of up to 500 MB per PDF file. This helps keep PDF archives manageable for storage, sharing, and access.

preview

Email & Attachment Preview

Preview email content and attachments before starting the backup. Users can verify the data they are about to export and select the required messages with greater confidence.

1000+ Thunderbird Emails to Migrate? Map Every Source to the Right Mailbox

Organizations dealing with very large datasets often have to handle several Thunderbird profiles, local folders, . sbd subdirectories, and mailbox folders manually—quite a labor-intensive task indeed. That's why the Mailbox Mapping feature lets you transfer all your chosen Thunderbird information into one or more selected Microsoft 365 mailboxes—or even link individual source files/folders directly to particular mailboxes. You can search destination users or import multiple users through CSV, with 1:1, 1:M, M:1 & M: M mapping support. For Google Workspace, map the required source data to specific users. The “Follow Tree Hierarchy” option helps users retain the original Thunderbird folder and subfolder structure during migration.

How to Use the Aryson Thunderbird Backup Tool

Load your Thunderbird profiles, select mailbox data, and back it up to your preferred destination.

Step 01: Download and Install the Software

Install the Aryson Thunderbird software on a Windows / Mac system and run it with administrator privileges.

Step 02: Load the Thunderbird profiles

Select the “Select Profiles” option to load Thunderbird profiles or local folders. The software detects the available profiles and displays their details for selection.

Step 03: Preview & Select Data
In the advanced preview panel, preview the emails, attachments, folder structure, HTML content, and other metadata and select the profiles and folders/messages to back up.
Step 04: Choose Backup Destination
Select the output format or destination email client as per your requirement
Step 05: Apply Filters
Apply the additional filters offered by the software, such as Date Filter, Remove Duplicates, Custom Folder Name, and more.
Step 06: Start the Migration
Click on the Start Export button to begin the conversion process and cross-verify the migrated profiles and data via the migration panel.

Aryson Thunderbird Backup Tool: System Specifications

Software Download

Size: 243MBVersion: 26.8

Trial Limitations

The trial version of the Aryson Thunderbird Backup Tool allows users to back up up to 50 items per folder. If you need to process the complete Thunderbird mailbox, users can upgrade to the full version of the same software.

Requirements & Supported Versions

Processor: Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz

Hard Disk Space: 500 MB of free hard disk space required

RAM: 4 GB of RAM (4 GB is recommended)

Supported Platforms

Window OS: Windows 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, and 95.

Thunderbird: Supports Thunderbird profiles and local folders for loading and backing up mailbox data.

Software Prerequisites

Does the Software Support SAN and NAS storage systems?

Yes, it perfectly works on such storage technology as long as files are transparent, which is usually the case.

Kindly follow the instructions when using Windows 10.

To let the software work smoothly, follow the steps below:

  • Go to Windows Defender.
  • Click on 'Settings'.
  • And turn off real-time protection.

FAQ

Request For Software Customization

If you need to customise Aryson Software or need some additional specific features, then provide the software customisation Request Quote.

Aryson Thunderbird Backup Tool: Compare Free & Premium Versions

Compare the demo version and the licensed versions to meet process-specific requirements.

Product Features Free Version Full Version
Backup Thunderbird Profile Data Migrate 50 Email Items Complete Mailbox
Load Thunderbird Profiles & Local Folders Migrate 50 Email Items Complete Mailbox
Select Multiple Profiles
Select Specific Folders
Preview Attachments
View HTML, Plain Text & Email Headers
Preserve Folder & Subfolder Structure
Migrate Thunderbird Data to Supported Email Clients
Migrate Thunderbird Data to PST, MSG, EML, MBOX, PDF, CSV
Merge MBOX Files
Custom Output Folder
Split Large MBOX Files
Skip Previously Migrated Emails
Compatible with All Windows & Outlook Versions
24/7 Technical Support
Price Free $499
Money Back Policy

Trusted by IT Teams Worldwide

Supporting organisations of every size with secure, reliable, and enterprise-ready mailbox conversion solutions

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Frequently Asked Questions

Ans. Yes, at the time of mailbox loading, the preview panel will recognize the folder hierarchy, including the .sbd folders, local folders, standard folders, and custom ones as well. Also, the folder structure is kept intact in a way that all the important messages remain organised as per their original location.

Ans. The process of reinstallation, or replacement of the system, might result in loss of significant information. In order to avoid the same, consider exporting your Thunderbird data to a supported backup format. This will ensure data restoration, archiving, and migration.

Ans. Microsoft 365 migrations support both modern OAuth authentication and impersonation-based access methods. Your configuration may require a client ID, client secret, tenant ID, and admin account details – all dependent upon your chosen authentication workflow.

Ans. Google Workspace authentication uses a service-account JSON key, administrator account ID, and domain-wide access. This setup allows administrators to authenticate the destination environment and perform mailbox mapping for supported migration workflows.

Ans. The software allows users to load multiple profiles, select required folders or messages, apply filters, and monitor processing through the migration panel. Large MBOX files can also be split to make the resulting backup easier to handle.

Ans. The progress panel provides details such as processed messages, file count, current status, processing time, source and destination information, and progress. This gives administrators visibility into the running backup or migration operation.

Ans. Yes, the attachment handling options allow users to control whether attachments are included or excluded during export. This can be useful when the primary requirement is to preserve email content while reducing the resulting backup size.

Ans. Yes, to use Mapped with Default Mailboxes, a Google Takeout file must be present in the Thunderbird Local Folders. The software maps standard folders to their corresponding destination folders, while Follow Tree Hierarchy retains the source folder and subfolder structure.

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