A flexible file format is an MBOX file. Numerous email clients are compatible with it. Yet, users can experience problems with MBOX files. "Import MBOX File Greyed Out in Thunderbird" is one of the most typical errors.
Thunderbird is a well-known email program. To see and analyze their data within their Thunderbird profile, many users move or save their data in the.mbox format. For instance, you would need to convert Microsoft Outlook to MBOX format before opening the MBOX file in Thunderbird if you use MS Outlook at work and need to migrate data to your home computer, where you have Thunderbird installed.
There are a lot of cases when you have to save your data as an MBOX file and then import it into your Thunderbird profile. However, the option becomes grayed out so that you are unable to import an MBOX file into Thunderbird.
Understand User Worries:
Hello everyone! I have been using Thunderbird for the past 2 years. I tried to import MBOX files into Thunderbird account, but I got an error message that said, "It is not possible to import in the Thunderbird." I tried importing the files again after making sure everything was in order, including my internet connection, but the problem persists. Please provide advice on how to resolve Thunderbird's grayed-out import MBOX file issue.
Alternative Causes of Greyed Out MBOX File Imports
There are several potential causes for this issue. Users need to identify the root cause of their issue. Here, some important issues are discussed. Look them over:
It is conceivable that there is a problem with the MBOX file. because Thunderbird disables the import option since it cannot detect it.
There are issues with the Thunderbird program.
It might not be updated, which makes responding to simple works challenging.
How to Switch on MBOX Import in Thunderbird by Hand:
If Thunderbird's Import MBOX file is grayed out, you can use the manual steps listed below:
Launch Thunderbird, then select the Help menu.
Select Thunderbird now, and it will look for updates automatically.
Thunderbird will install any updates that are available.
The import feature cannot be used by an outdated version of Thunderbird, and it can also cause worablity problems.
Click on the menu after opening Thunderbird.
Tap on Extensions after selecting Add-ons and Themes.
After finding Import/Export NG Tools, select Add to Thunderbird.
Add-ons can be activated by restarting Thunderbird.
Make sure there are no extensions like mbox.txt and that the MBOX file is set up correctly.
To get rid of any extra resources, rename the file if needed.
After installing Thunderbird, opt for the folder you wish to import by right-clicking on it in Thunderbird.
Find Import MBOX files after selecting Import/Export NG Tools.
Difficulties of a Manual Methods
Thunderbird slows down & freezes when dealing with large MBOX files, which delays the import process.
Thunderbird might not import an MBOX file, whether it is properly formatted or damaged, and data loss could occur.
You must manually manage the import process, handle updates, and add-ons because this step is not automated.
Even after adding add-ons that require regular updates, users with outdated Thunderbird can still have compatibility problems.
Users must use third-party software if none of the following choices are effective.
A Brilliant Way to Fix the "MBOX File Greyed Out Error"
One of the finest choices for quickly moving MBOX files into Thunderbird is BLR MBOX Converter Tool. An option to upload MBOX files straight to Thunderbird is given. To view MBOX files in Thunderbird, you must first install Thunderbird. Regardless of the email client from which they were created—Apple Mail, Opera Mail, Entourage, Eudora, etc.—this program supports all versions of MBOX files, like MBOX, MBX, MBOXCL, MBOXCL2, and more.
After downloading the automatic program on your PC, select Next.

You can choose which MBOX files or folders to convert.
From the list of options for choosing to save, pick Thunderbird.
After choosing the file naming option, enter the destination.
When needed, tap the Advanced filter, then click the "Convert" button.

The program will now provide a real-time progress report and, after the operation is finished, direct you to the Thunderbird local folder.

Attributes of the Skilled Solution That Offer Examples
Also, it provides the ability to import MBOX files into a number of email clients, such as Gmail, Yahoo, Outlook .com, Office 365, and several others.
Further, this program enables the Export of MBOX files as HTML, CSV, RTF, PDF, PST, TXT, EML, and more.
With this program, you can quickly convert one or a large number of MBOX files without losing any of their individual characteristics.
It also allows for the conversion of specific MBOX file data, such as date range, subject, sender, recipients, and more, using advanced filters.
This program allows you to use file naming conventions to save results and properly manage mailbox data.
Final Thoughts,
We have given a thorough explanation of the "Import MBOX File Greyed Out in Thunderbird" problem. Also, we have described both automatic and manual methods for resolving this issue. We suggest selecting the professional way to ensure that the task is finished without any data loss, as the manual option does not guarantee a fix.