How to Archive Thunderbird Email: Step-by-Step Archiving Guide

Written By Rohan Wiese
Updated on September 4th, 2025

Mozilla Thunderbird is one of the most popular open-source email clients. It is known for its flexibility, add-ons, and cross-platform support. Over time, you get thousands of emails in your inbox. It can slow down your Thunderbird account. The best way to solve this issue is to archive your Thunderbird emails. It helps you to improve performance and free up mailbox space. Now the concern is how to archive Thunderbird Email? Although Thunderbird provides some built-in archiving options. Still, many users prefer Aryson Thunderbird Backup Tool to perform large-scale email archiving with ease.

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Table of Contents

Some Common Reasons to Archive Emails in Thunderbird

When a user thinks to archive emails in Thunderbird, it is not just about save space. Along with storage space, it will keep your mailbox safe and easy to use.

Here are some common reasons why users prefer to archive Thunderbird messages:

Free up inbox space: Old emails move to an archive folder, so your inbox has enough space to store new messages.
For smooth performance: With a few emails in the inbox, Thunderbird will run fast and smoothly.
Easy to manage: When you store the archived emails in separate folders, it becomes easy to find them when you need those emails.
Safe storage: You do not need to delete emails. Simply, archive all your important emails to keep them safe.
Access anytime: Users are able to open new ones along with old ones whenever they need them.
Simple backup: Archived folders can be copied or moved to another computer easily.

No matter if it is for personal use or professional use, Thunderbird email archiving helps you keep Thunderbird organized and reliable.

Top 3 Procedures to Archive Thunderbird Email

To keep your Thunderbird mailbox neat and organized, you can archive your emails in different ways. Here are the top three methods to archive emails in Thunderbird. Before performing, keep in mind that each method needs a different kind of technical expertise and time accordingly.

Procedure 01: Archive Thunderbird Emails with the Built-In Feature

Thunderbird has a built-in archive button to move emails from your inbox into a separate archive folder.

Go to the Inbox or any folder and select the emails you want to archive.
Right-click the selected emails and choose the Archive option.
To pick the Archive option, simply press the A key on your keyboard.
Now, Thunderbird will automatically move selected emails into the Archive folder under your account.
To view archived emails, go to the left-hand panel and click on the Archive folder.

Procedure 02: Move Emails into Local Folders to Archive them Manually

If you want to manage your emails in another way, you can create custom folders. To create this, you can navigate to the under Local Folders section and move your emails one by one manually. With this approach, you can name folders as you like. Along with that, organize them by year, project, or category.

Steps of Thunderbird Email Archiving in your Local Folders:

Open Thunderbird and look at the left-hand panel.
Right-click on Local Folders and choose New Folder.
Enter a name for the folder, such as “Work Archive 2025” or “Personal Archive.”
Go back to your inbox and select the emails you want to move.
Drag and drop the emails into the new folder under Local Folders.

This method is useful if you want customized archiving and prefer to keep emails separate from the default archive folder.

Procedure 03: Customize Archiving Options in Thunderbird

Also, Thunderbird allows you to adjust how your emails are archived. You can choose whether to organize them by year, month, or keep them in a single folder. Along with that, you can decide that where you want to store archived emails. Either it can be under your account or in Local Folders.

Steps to Customize Archiving Options to Archive Emails in Thunderbird:

In Thunderbird, click on the Menu (≡) button.
After that, select the Account Settings from the given list.
In the left panel, choose Copies & Folders and move next.
Under the Message Archives section, tap on the Archive Options.
Select your preferred folder structure:
Yearly Archive: Emails grouped by year.
For the monthly Archive, you can group Emails according to the month.
Single Folder: All archived emails are saved in one folder.
Choose the storage location (within your account or under Local Folders).
Save the settings, and Thunderbird will archive emails according to your chosen structure.

Cons of Using Manual Procedure

Above written Thunderbird’s manual archiving methods are useful. Also, they come with some drawbacks. These limitations can affect both convenience and data safety. Here are some of the common cons of using manual procedures:

When you move emails manually, it requires additional effort in terms of a large data set.
Thunderbird’s default options don’t allow provide any additional options to filter out data.
If your Thunderbird profile or local folders get corrupted, archived emails may become inaccessible.
Archived emails remain in local storage, so they don’t actually reduce the size of your Thunderbird profile.
Emails are archived only in Thunderbird-supported formats. Hence, it cannot be directly opened in other clients without conversion.

Because of these drawbacks, manual archiving is fine for light use but may not be the best choice for businesses or users with very large mailboxes.

Best Alternative to Handle Bulk Thunderbird Email Archiving

To save time and avoid data loss, use Aryson Thunderbird Backup Tool. So that, at least, you can keep a safe backup of your Thunderbird emails. It can securely archive and back up Thunderbird emails in bulk without affecting data quality. It not only stores your emails safely but also gives you the flexibility to export them into multiple formats, such as PST, MBOX, EML, MSG, and PDF:

Archive and back up Thunderbird emails in bulk with 100% accuracy.
Export Thunderbird Mail to PST, MBOX, EML, MSG, HTML, and PDF.
Maintain folder structure, attachments, and meta properties during backup.
Migrate Thunderbird Emails to Google Workspace, Gmail, Office 365, Yahoo, and more.
It comes with advanced filters to back up emails by date, subject, or sender.
Simple and user-friendly interface for both technical and non-technical users.
Along with that, you can use this software on any version of Windows OS.

Follow these Steps to Archive Thunderbird Email In Bulk

Download and run the Aryson Thunderbird Backup Tool on your system.
Now, you can select the specific Thunderbird email account from the list.
From the upcoming panel, preview and cross-check the selected email data.
According to your requireneelect the output format or choose a cloud platform.
Now, you can browse and select the destination path to save the archived emails.
At last, click on the Convert button to start the Thunderbird archiving process.

Conclusion

Now, you know how to archive Thunderbird Email with the given methods. According to the time and technical expertise, you can proceed with any of the above-mentioned methods. For users with large mailboxes or those who need more options, the Aryson Thunderbird Backup Tool is a better choice. It lets you archive many emails at once. Along with that, you can save them in different formats, and even back them up to cloud accounts easily.

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About The Author:

Rohan Wiese

Rohan Wiese is a Technical Writer at Aryson Technologies. He is an expert Email Forensic, Cloud Computing, and a passionate nerd with over 10 years of experience in technical content writing. He writes about Cloud Migration, Database Recovery, Email Backup, Windows, Mac, and Tech.