How to Solve ‘Import MBOX Greyed Out-File’ Issue in Thunderbird?

Quick Overview: Are you trying to import an MBOX file into Mozilla Thunderbird but still having the issue of ‘Import MBOX Greyed Out-File’? This issue occurred when users tried to import MBOX files but they found the option unavailable or disabled. The problem usually happens for several reasons such as outdated Thunderbird versions, issues with the ImportExportTools NG add-on, corrupted MBOX files, or users trying to directly import into the IMAP folder. In this guide, users can the quick solutions to solve issues in Thunderbird.

Cause: Why to ‘Import MBOX Greyed Out-File’ in Thunderbird?

This issue may happen for many reasons:-

• Thunderbird directly does not support MBOX import. Users need an ImportExportNG Add-on in Thunderbird to Import MBOX Files.
• If the user’s MBOX files are corrupted or damaged then Mozilla Thunderbird can’t recognize it.
• The outdated or older version of Mozilla Thunderbird may not support the import function.
• A wrong location of the MBOX file will stop Thunderbird from detecting it.

How to Fix ‘Import MBOX Greyed Out-File’ in Mozilla Thunderbird?

Attention Users: Users should keep following each step because this process can be long any single mistake can lose their important MBOX files.

Solution 1: Use ImportExportTools NG Add-on

• First, start Thunderbird and go to Tools > Add-ons and Themes.
• Search ImportExportToolsNG and Install it.
• Re-start Thunderbird to activate the add-on.
• Navigate to Import MBOX file under Tools > ImportExportTools NG.
• Select “Import directly MBOX files” then press “OK.”
• Find your MBOX file and launch it.
• MBOX files have now been successfully imported into Thunderbird.

Method 2: Manually Import MBOX Files in Mozilla Thunderbird Profile Folder

• Open Mozilla Thunderbird, go to Help > More Troubleshooting Information.
• Locate the Profile Folder under Application Basics, then select Open Folder.
• Find the ImapMail or Mail folder within your profile.
• In the proper subdirectory, copy the MBOX file.
• Activate Thunderbird back on.
• Look for the MBOX file.

Solution 3: Repair Corrupted/Damaged MBOX Files by Third-party Tool

If your MBOX files are corrupted or damaged you should use third-party software like BLR MBOX converter. Users can use the simple and direct solution to solve the “Import MBOX Greyed Out-File” issue. This solution is easy to operate by technical and non-technical users. There users only need to follow 4 steps to solve the MBOX files issue. Users can download this software in any Windows operating system such as Windows XP, Vista, 7, 8, 8.1, 10, and 11. Easy solution for MBOX greyed out file and quick method to Import MBOX emails data files on Thunderbird, Gmail, iCloud, Exchange Server, Office 365 and so on.

Steps to Repair Corrupted MBOX Files:-

• Download the software.
• Open the tool and select the damaged MBOX files.
• Scan or repair the corrupted MBOX file.
• Use ImportExportTools NG to re-import the repaired MBOX file into Thunderbird after saving it.

Keep Attention: Users can use this tool to convert MBOX files to PST, EML, EMLx, MSG, HTML, and many other file formats. BLR MBOX email data not only repairs MBOX files this tool also converts MBOX files to multiple IMAP accounts without installing multiple software.

Essential Characteristics in Expert Solution

• Repair Damaged MBOX files.
• Easy to operate.
• Simple Graphical user interface.
• Work with all Windows OS.
• Convert MBOX to PST, HTML, O365, Gmail, and other formats easily.
• Direct conversion without lengthy steps.

Solution 4: Update Mozilla Thunderbird to the Latest Version

• After launching Thunderbird, select Help > About Thunderbird.
• Install the latest version and restart the program.
• Start with loading the MBOX file once again with “ImportExportToolsNG”.

Writer End Note,

It might be frustrating when you see the issue “Import MBOX Greyed Out-File” problem in Thunderbird. With this guide, users can easily fix it by following the steps outlined below. Restoring functionality can be aid by improving Thunderbird, fixing the MBOX file, patching it, or using ImportExportTools NG. For a smooth import process, think about working with expert BLR MBOX email file conversion software, if you still experience problems. Users can also import MBOX files into Outlook PST format by using this professional tool.

Also read more about MBOX software and check the solution to easily fix issues with MBOX files and import easily on Outlook, Gmail, iCloud, Thunderbird, Exchange Server and so on.