Lotus notes NSF to PST can be converted by using the Synspire application and then you can open the NSF file. Just you have to Install the application on your personal computer.
I opened the Free NSF to PST Converter on my PC, then I browsed and added Lotus notes. After that option to check the preview of the NSF mailbox displayed on my screen due to which I checked all the mailbox data . Then I selected the export button. Then I selected PST under Export options and chose the desired items to export.
Then I can check on the ongoing process. There can also be selective conversion of items and all the email properties will be maintained properly like To, CC, Date-Time, Subject.
One thing can be assured is that you can open the NSF file in Lotus Notes.
More information:- NSF to PST Converter tool