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Let’s Resolve “Impossible to Import in This Folder (IMAP or Newsgroup Type) Thunderbird” Issue

Bhawna Barwal | software technology | 4 minutes read | Last updated on May 22nd, 2025,

Recently I have installed add-ons feature in my Thunderbird email client. One my friends suggested me this, as it helps to import and export files into email client. Unfortunately there is an error occurred such as impossible to Import in This Folder (IMAP or Newsgroup Type) Thunderbird. I do not know what to do with this. I need to use the email client to import some files. How can I get rid of this kind issue? Kindly help me.

Introduction

Do you have a need to import MBOX files for backup purpose? Or need to switch email client? However, the process of this is very simple unless and until you encounter the issue “impossible to Import in This Folder (IMAP or Newsgroup Type) Thunderbird. Are you also facing the same issue like this? Do not worry then, in this article you will going to explore the solutions to tackle such kind of error in detail. Let’s start our blog now.

Manual Solutions to Tackle “Impossible to Import in This Folder (IMAP or Newsgroup Type) Thunderbird”

Let’s know how you an import MBOX files into different email client without facing any error:

With Mozilla Thunderbird

  1. Go to your email account and click on the New Folder.  
  2. Create a new local folder.
  3. Now go to Tools thereafter click on the Import.
  4. Choose Mail and MBOX file.
  5. Browse for the MBOX file to simply import.

In Microsoft Outlook

  1. Open MS Outlook app in your system.
  2. Now go to “File” option.
  3. Then, go with Account Settings>>Data Files.
  4. Now, press on the Add and create a PST file.
  5. Or you can import MBOX files with the help of MBOX to PST Converter Tool.

 With Apple Mail

  1. Go to the Mailbox.
  2. And then click on the New Mailbox and select on my Mac.
  3. Create one mailbox.
  4. Go to “File” option then Import Mailboxes option.
  5. Now select MBOX files and import it.

Shortcomings of Manual Process

The above solutions can be hectic, if you have large numbers of MBOX files to import. It consumes lots of time to import MBOX files manually. Also, users from non-IT background may face difficulty in understanding the manual process. Let’s see the precise approach for this in the next segment.

Alternative Yet Professional Method to Fix the Issue “Impossible to Import in This Folder (IMAP or Newsgroup Type) Thunderbird”

BitData Migration Thunderbird Converter – It is the potent method to import MBOX files. This app makes it possible to MBOX from local folder in the system. And it enables to upload whole folder as well as individual files. Users can simply select multiple files as per preferences. The tool import MBOX data keeping the folder hierarchy intact. And users do not have to lose any single piece of essential information using this application.

win download buynow

mac download buynow

This Thunderbird Tool enables to export MBOX, EML, SBD, no extension file, etc. Also, it takes few seconds to import bulk data without encountering any error. Any sized MBOX file is eligible to import with the app. Also, it can be available for all Windows Operating Systems editions like Windows 10, Windows 11, Windows 8.1, Windows 8, Windows 7, Windows XP, Windows XP, etc. Users also have a free demo opportunity if they opt for this method.

How to Use Thunderbird Tool?

Here is a quick and precise working guide to negate errors while importing Thunderbird files:

  1. Open the suggested software on Windows OS.
  2. Now upload Thunderbird data with adequate option.
  3. Select MBOX export option.
  4. Choose saving path accordingly.
  5. Lastly click on the Export tab.

Benefits of Automated Solution

Batch Migration: The software is proficient importing huge Thunderbird data at once, without any error. This can save precious time of the users.

Keep Folder Structure Intact: While using this, no item can be replaced from its original place. It negates risk of losing data. This is how it delivers 100% accuracy in its resultants.

No File’s Size Issue: This application does not impose unnecessary file size restriction. Hence, users can simply import large-sized file with no obstruction.

Provide Several Export Option: The tool provides various saving options for example MBOX, PST, PDF, EML, MSG, Office 365, Gmail, Outlook.com, etc.

Easy to Use:  The software has intuitive interactive interface. Users from any educational background can effortlessly use the app, without facing any hindrance for sure.

Read more

Fix “Thunderbird Not Receiving Emails and Downloading Emails”

How to Migrate Thunderbird to Google Workspace

Import Thunderbird to Exchange Server

Let’s Sum Up

The suggested solution in this article will definitely work out in order to resolve the issue of “impossible to Import in This Folder (IMAP or Newsgroup Type) Thunderbird”. If you are a novice technical user and also want to fix the issue professionally, then you can utilize the mentioned software. The manual solutions require some technical expertise and also have several limitations. This software works in Windows and Mac OS Monterey, Catalina, Mojave, High-Sierra, Big-Sur, and many more, and also provides free demo to import 20 emails without any charges.