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How to Upload MBOX File into Thunderbird Account?

Do you want to know how to upload MBOX file into Thunderbird in the most efficient way possible? Do you want to learn how to use Thunderbird to add MBOX files? Don’t worry; this article will cover some of the most straightforward techniques for uploading MBOX files into Mozilla Thunderbird.

Mozilla Thunderbird is a free email client that is gaining traction. Because of its easy-to-use design and upgrade functionality, more and more users are choosing Thunderbird every day. If you use Thunderbird, you may want to import MBOX files since data from many email applications is saved in MBOX format.

The users’ primary concern, in this case, is the data integrity of MBOX files. Importing MBOX files into another Thunderbird can result in data loss and corruption since the MBOX files were produced in a different email client/profile. Users need a way to import MBOX to Thunderbird, hence they need a solution. Continue reading to learn more about the data import procedure and a quick overview of Thunderbird and MBOX.

Overview of Mozilla Thunderbird & MBOX File

Mozilla Thunderbird is a Mozilla Foundation-sponsored desktop-based multi-platform email client. Thunderbird, like Microsoft Outlook, lets you set up several email accounts using POP or IMAP. Email management, as well as contacts, calendar, and tasks, are all included in this email client. The MBOX file contains the mailbox data. Because Thunderbird is one of the most extensively used email clients, it may become required for them to import MBOX files.

When it comes to email apps, MBOX files are one of the most extensively used file types. The MBOX file and its variations are used by a variety of email applications for both Windows and Mac OS. Opera Mail, for example, saves data in MBS format, while Eudora Mail saves data in MBX format. Both MBX and MBS are MBOX file versions and are erenköy escort interchangeable.

Where Can I Find MBOX?

The default location of your MBOX should be as follows if you haven’t altered it manually:

C:\Documents and Settings\*username\Application data\Thunderbird\Profiles\*name.default

Why Upload MBOX to Thunderbird Application

There is no one-size-fits-all justification for users who want to import MBOX files into Thunderbird, as circumstances might differ. The major reason for this is that MBOX files cannot be open without the use of an email client that supports MBOX files. As previously stated, MBOX files are used to store data from multiple email apps. MBOX compatible email programmes are require if users want to open MBOX files outside of their primary email application. The majority of users use Thunderbird to open MBOX files since it is a free application that works on both Windows and Mac. Users also wish to migrate their Thunderbird profiles to their new computers when they swap PCs. They must transfer Thunderbird profile data into Thunderbird in this scenario as well.

How to Upload MBOX File Into Thunderbird

There are two ways to relocate MBOX files in Thunderbird, to put it simply. ImportExportTools and Thunderbird Import Wizard are the first and second, respectively.

Step 1: Using the Manual Method, install MBOX in Mozilla Thunderbird

The free add-on is the primary alternative for Thunderbird users who want to import MBOX files. ImportExportTool is the name of this plugin. Keep in mind that the Mozilla Foundation did not create this extension. The following steps will show you how to use this programme to import MBOX files into Thunderbird:

1. Open Thunderbird and select Tools from the drop-down menu.

2. Select import MBOX file from the ImportExportTools menu.

3. By default, the option “Import one or more MBOX files directly” is chosen.

ImportExportTools: How to Setup

Follow these steps if you haven’t already done so:

1. Go to and download the importexporttools.xpi file.

2. Go to the Menu >> Tools >> Extensions tab in Thunderbird.

3. Choose Install Add-on from File from the Gear icon.

4. Select and install the xpi file you just downloaded.

5. When Mozilla Thunderbird has finished installing, restart it.

Limitations With Manual Approach

Importing MBOX files by hand has a number of flaws. This approach, like any other manual technique, has its drawbacks. When attempting to import MBOX files into Thunderbird, you will encounter the following problems:

  • Attachments were missing.
  • Inline photos that are broken
  • Emails that have gone unread
  • Header data that is incorrect

Hassle-Free Way to Upload MBOX File into Thunderbird

MBOX Converter is the perfect tool to use if you want to migrate an MBOX file into Thunderbird without errors. Multiple MBOX files can be transfer into Thunderbird with its assistance. MBOX files may be move into this programme from any email client that supports the format. All you have to do is download and install the programme, then follow the procedures that will be mention in the coming section of this write-up. Along with uploading, this utility also move MBOX to Ofice 365, iCloud, Exchange, Gmail, Google workspace and many other webmail accounts as well.

Steps to Transfer MBOX Emails to Thundrebird Using Automated Tool

1. Install and launch the SysConverter for MBOX on your system.

2. Select Open >> Email Data File >> MBOX File >> Select File or Folder.

3. Click on Export and choose Thundrebird from the different saving options.

4. At last, check the saving location (show the location of the space where your Thunderbird mailbox data is store) and hit on the Save button.

All Done! Here you upload MBOX file into Thundrebird within a few simple steps. Most importantly you will not lose a single bit of your data.

Benefits of Using Automated Tool

1. Compatible with a variety of email clients’ MBOX files: MBOX files are support by a variety of email clients. You may use MBOX files from a variety of email apps to import MBOX to Thunderbird. It can import Apple MBOX files to Thunderbird, Gmail MBOX files to Thunderbird, Eudora MBOX files to Thunderbird, Entourage, Opera Mail, Alpine, Spicebird, Claws Mail, SeaMonkey, and more programmes.

2. Compatible with all Windows operating systems: This programme works on both 32-bit and 64-bit versions of Windows. As a result, the utility may be use on Windows 10, Windows 8.1, Windows 8, Windows 7, Windows XP, Windows Vista, Windows Server 2019, Windows Server 2016, Windows Server 2012, Windows Server 2008, Windows Server 2003, and Windows Server 2019.

3. Upload MBOX in bulk to Mozilla Thunderbird with attachments: The programme may import MBOX in mass to Mozilla Thunderbird with attachments. Users may also import old emails to Thunderbird without any problems, in addition to current MBOX emails.


Thunderbird email programme and MBOX file are both well-known among today’s users. When this is necessary, they frequently need to import MBOX into Thunderbird. They fail to upload the MBOX file due to a lack of understanding of the proper method. Given the circumstances, this article outlined many approaches for getting Thunderbird to import MBOX files. For trouble-free MBOX file importation into Thunderbird, users can use either ImportExportTools or Thunderbird Importer Tool.

Also Read: Open OST File From Another Profile