SysTools MBOX to NSF Converter Tool
Export Thunderbird MBOX File into Lotus Notes

(Average Rating 4.1 Based on 1061 Reviews)


MBOX to NSF Converter





  • Converts Multiple MBOX files into NSF format in Bulk
  • Automatically scans data from various MBOX supported Email clients
  • Supports both Selective and Batch Conversion of MBOX data
  • Export MBOX emails with all Attachments intact easily in NSF
  • Preserves Data Integrity on completion of MBOX to Lotus Notes NSF conversion
  • Retains original Folder Structure while exporting Thunderbird MBOX file to Lotus Notes
  • Avail Multiple Previews of each and every email message before migration process
  • Provides option to merge multiple MBOX files into a single NSF file
  • Supports Auto detection of Mozilla Thunderbird mailboxes
  • Requires Installed and Configured IBM Notes of any version 6.5, 8.0, 8.5, 9.0, 9.0.1, 10.0
  • MBOX to Lotus Notes extractor software offers option to split NSF file as per required size
  • Compatible with all latest Windows (32-bit & 64-bit) OS versions

Free Live Demo – SysTools MBOX to NSF Converter Fully Secured Download Version

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The Perfect Way to Convert NSF Files to EML, MSG & file

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Prominent features of SysTools MBOX to NSF Converter Software
Export MBOX files data to Lotus Notes 10.0, 9.0.1, 9.0, 8.5, 8.0, 6.5

MBOX to Lotus Notes NSF Conversion

MBOX to Lotus Notes NSF Conversion

MBOX to IBM Lotus Notes Migrator is a smart tool that easily converts multiple MBOX files to NSF without any data loss issues. You can directly import data from several mailbox files stored in a folder for batch conversion. Even emails that are permanently deleted from the MBOX file can be easily recovered by the software.

Detects multiple email clients

Detects multiple email clients data

The software is capable of automatically scanning various MBOX supporting email clients installed on the local Windows machine. You can directly import data from these applications without having to locate their mailbox data file manually. These supported email clients are Mozilla Thunderbird, Eudora, Entourage, PocoMail, Netscape Mail, SeaMonkey, and SpiceBird Mail.

Selective Export

Selective Export

You can simply select particular emails from any imported MBOX file and convert them into NSF format. One way to do that is to select and right-click on particular email messages to export them in IBM Notes data format. Alternatively, you can also selectively choose from all the folders on the export options panel, to move to NSF.

Gmail MBOX to NSF Conversion

Gmail MBOX to NSF Conversion

Google provides an option to users to request and download all their emails using Google Takeout feature. It saves all these email messages in a single MBOX backup file. The Thunderbird MBOX to Lotus Notes converter can migrate all Gmail emails from the backup file to NSF format in one go.

Supports All MBOX variants

Supports All MBOX variants

Around 20+ email clients stores their data in multiple types of MBOX files such as .mbox, .mbx and MBOX file without extension. This MBOX emails to Lotus Notes utility supports all these mailbox file variants and can easily export data from them to NSF format.

Split Large NSF file

Split Large NSF file

Large database files results in degradation in the performance of Lotus Notes. With this software, you can easily export the large sized MBOX data to smaller NSF ones before the migration process. It lets you split the file in desired size of MB or GB.

Multiple Preview

Multiple Preview Options

MBOX to IBM Notes Extractor provides users with a total of eight different views including HTML view, header view, etc. You can also view all the compatible attachments withing the tool before conversion.

Detailed Report

Generates Detailed Report

On export completion, the utility automatically generates a detailed report of the entire process. You can save this report in either CSV format or in HTML format for future reference.

Supports All Lotus Notes

Supports All Lotus Notes versions

The software requires installation of any version of IBM Notes on the Windows machine for Thunderbird MBOX to Lotus Notes migration. Also, the email client should be properly configured for any valid or dummy profile account.

Windows 64-bit version

Windows 64-bit version

MBOX to NSF Converter is a Windows OS based software application and is compatible with all the Windows versions including Windows 10, 8.1, 8, 7 and below versions. Furthermore, it also supports both the Windows bit versions: 32-bit and 64-bit simultaneously.

MBOX to NSF Converter Specifications

Download the software to convert MBOX to Lotus Notes easily

Software Download

Size: 35.0 MB

Version: 5.0

MD5: 17097890dc3c9fc956a197ea58b8bb8a

Trial Limitations

Freeware Demo of MBOX to Lotus Notes NSF Converter previews all emails & Export 25 items per folder into NSF format.

System Specifications

Hard Disk Space
100 MB of free hard disk space required

2 GB is recommended

Intel® Pentium 1 GHz processor(x86, x64) or equal


  • Microsoft .NET framework 4.5 or above should be installed.
  • If you are using Window 10/8.1/8/7 or Vista, then please launch the tool as "Run as Administrator".
  • Requires Installation of IBM Notes Client 6.0, 7.0, 8.0, 8.5, 9.0, 9.0.1 or 10.0

Supported Editions

  • Windows 2000, 2003, 2008, XP, Vista, Windows 7/8/8.1, 2008/2012 , Windows 10 (32-bit & 64-bit)
  • All versions of Lotus Notes 6.0 & above




Electronic Delivery


Overview of DEMO and Licensed Version

Get an Overview of MBOX to NSF Converter Features

Features DEMO Version FULL Version
Scan MBOX Files & Folders
Auto-Detect Email Clients
Preview MBOX Emails with Attachments
Supports Windows 10 & below versions
Switch Views - Horizontal & Vertical
Maintain Folder Hierarchy
Split NSF Files
Support Windows 10/8.1/8/7 and below versions
Export MBOX to NSF, EML, MSG, PST or HTML Format 25 Items / Folder
Cost FREE $39
Frequently Asked Questions

Listed Commonly Asked Questions and Answers

How do I work with MBOX to Lotus Notes conversion software?

mbox to nsf conversion tool

Steps for MBOX to NSF conversion on Windows:
  • Step 1: Click “Add File” & select “MBOX” option.
  • Step 2: Add MBOX files to convert to NSF (Lotus Notes).
  • Step 3: Preview MBOX emails in the interface.
  • Step 4: Select “NSF” and convert MBOX to NSF.

Yes, the tool can easily extract all the email attachments fully intact. It does not tamper with any mailbox items during conversion.

Yes, the MBOX Mail to IBM Notes Extractor requires installation of Lotus Notes application with a configured profile for its migration process.

There is no file size limitation whatsoever imposed by the software. In addition, option to reduce size of output NSF file is given by splitting them into multiple files.

Yes, the Domino Server also creates NSF, thus, file is supported on Domino Server as well.

Yes, the MBOX to IBM Lotus Notes Converter is fully compatible with all Windows OS (32-bit & 64-bit) versions

Whitelist the Thunderbird MBOX to Lotus Notes Converter in Antivirus settings. You can also disable the Anti-Virus when running the software to perform the conversion smoothly.

Conversation 1
  • : When I am importing data from Thunderbird to Lotus Notes, I am getting an Error Message:"Import Error — the mail folder could not be opened". What is the reason behind this? How can I perform this migration?
  • : IBM Notes does not support MBOX file. It uses NSF file to save all its mailbox items. you will need a third-party tool for this conversion process.
  • : The stated error appears because Lotus Notes doesn't support direct import of MBOX file. For accessing your MBOX on a Notes Client, you first need to convert the MBOX files into the supported format, i.e. NSF file. The Thunderbird MBOX to Lotus Notes Converter would be the best fit for fulfilling this requirement. You need to locate the MBOX file & select a destination file for NSF & you get the NSF file, which you can easily access, in Lotus Notes.
  • : Ok, Thanks
Conversation 2
  • : My high school email service will soon be shut out. I have preserved all the email copies on my school's Mac machine as MBOX file. Is there a way to transform the messages to be able to access them on my Windows OS having Lotus Notes mail client?
  • : Usually Apple Mail stores its database as an .mbox format file, which is not supported on Lotus Notes. First convert MBOX to Lotus Notes using the software & get back the access on an email platform other than Apple Mail, i.e. Lotus Notes. After getting the NSF file, you can import them on your Domino server as well as in an individual folder to differentiate between the converted & mapped emails.
Conversation 3
  • : In my office, I am using an IMAP account through Lion Mail. Earlier I have mapped it with my Apple Mail on my local machine; the email is no longer functioning as the server is creating some issue. I would like to save some of my important messages on a machine other than Mac before deactivating the account. All I need to do is transfer my full mailbox stored in a MBOX format file to Windows supported Lotus Notes email client.
  • : First Export all Apple Mailboxes to an MBOX file & copy the file on your Windows machine using an external storage device like pen drive or external hard drive. Run the SysTools MBOX to IBM Notes Converter software and convert your entire mailbox items from MBOX file into NSF file. All this is done without affecting the source MBOX file that you can keep as a backup copy for future.

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