How to Convert an MBOX File to NSF?

admin | file conversion how to software technology | 4 minutes read | Last updated on May 26th, 2025,
mbox to nsf

Commonly, Email file migration is necessary when users change from other email applications. If you have saved your email information in MBOX format, you want to convert it into an NSF file format. So, in this article, we will explain the most effective and reliable methods to address the issues related to how to convert an MBOX file to NSF format. Also, you can use the automated tool, MBOX to NSF tool. It converts a collection of MBOX to NSF bulk mode within a few seconds without any data loss. 

Why is It Necessary to Convert MBOX to Lotus Notes? 

There are multiple reasons present why users find it necessary to convert MBOX files into the Lotus Notes application. 

  • The MBOX is commonly used by various email programs such as Mozilla Thunderbird and Apple Mail, while Lotus Notes use the NSF format.
  • This migration process ensures that your email properties, such as email contents, attachments, calendars, and data integrity, are securely transferred without deleting information. 
  • The MBOX files are not compatible with the NSF format, so this is necessary to convert MBOX files to HCL Notes. 
  • During the conversion of MBOX to NSF, it enables you to access and open your emails in Lotus Notes.

Best Ways to Export MBOX Files to HCL Notes

In this passage, we will explain some reliable methods to smoothly convert MBOX files into NSF format. Then, you can use the preferred manual and professional method to export your MBOX to HCL Notes.

Method 1. How to Export MBOX Files to NSF – Manual Method 

To convert MBOX files into to NSF notes, then, you have to download the MS Outlook or Mozilla Thunderbird email clients on your local system. Then, you have to need to convert data to the PST format. After that, import PST files into Lotus Notes. 

Follow These Instructions to Export MBOX Files into NSF Notes

  • Firstly, start Mozilla Thunderbird and add the ImportExportTools NG add-on.
  • Then, go to the menu>> Add-ons>> Extensions, search and download it.
  • Now, restart Thunderbird after installation to convert MBOX files into Mozilla Thunderbird.
  • Then, right-click on the folders pane >>ImportExportTool NG >> Import MBOX files.
  • Next, allow IMAP in Gmail to add Gmail to Mozilla Thunderbird to sync Email.
  • Now, create a new folder under the Gmail account in Mozilla Thunderbird.
  • After that, drag and drop emails (Imported MBOX file) from the local folders to the Gmail folder.
  • Now, start Microsoft Outlook and configure the same Gmail Account and tap File.
  • Open and Export>> Import/Export>> Export to files>> Outlook files (.pst.).
  • The Lotus Notes doesn’t support PST format directly, so you will need to export PST to NSF.

Note: The manual method is only compatible with technically experienced users. Also, it is a long-lasting and tedious approach. Also, it needs downloading and using 3 different email applications while converting MBOX files to NSF manually. 

Method 2. How to Convert an MBOX File to NSF? – (Use Automated MBOX to NSF File Converter)

To avoid the manual method, the reliable method is to try the most authorised third-party software, MailDivert MBOX Converter Tool. The Software can convert batch MBOX files to NSF format directly without any data loss in a short time. It keeps and maintains all metadata, HTML, hyperlinks, attachments, email formatting, and other information during the conversion procedure. Additionally, the tool provides a best preview feature that will allow you to see all uploaded files in detail before the conversion. The application is compatible with MBOX-based email clients (Apple Mail, The Bat, Mozilla Thunderbird, Eudora, and more). The software has a simple and interactive interface along with different filter options. Moreover, the utility supports all versions of Windows and Mac OS versions.

Follow These Steps to Convert MBOX Files to NSF Files

  • Download and install the MBOX Converter Tool on your local system.
  • Then, select the MBOX files and folders that you want to convert into NSF format. 
  • After that, see all the uploaded MBOX file details on the preview panel.
  • Now, hit the Export button, and select NSF as the Output format to convert MBOX to NSF.
  • Now, click on the browse button, choose the destination path to save the Output file. 
  • Tap on the Convert to begin the procedure of converting the MBOX files into HCL Notes.

In-Short

The procedure for how to convert an MBOX file to NSF, along with attachments, isn’t direct when using manual techniques. Also, it has some limitations, like taking a long time to convert large quantities of MBOX files into NSF, high chance of data loss. Also, it is not suitable with naïve users, and the manual method has a lack of advantages and efficiency. In above section, we suggested MBOX to NSF best Converter to convert MBOX data into NSF format with a hassle-free solution. Also, it offers free demo editions, allowing users to convert the first 25 EML files into the Lotus notes application free of cost.  

Read more:

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