Considering my case, I had an orphan NSF file and also Lotus Notes were not installed in my device.
So, I had to go for my NSF file to another emailing application like the Outlook layout to open my NSF file.
Henceforth, I looked for a third-party tool which is the SysInspire NSF to PST converter tool.
The graphical interface of the tool is amazing and You do not need any technical experts for doing this conversion.
After conversion, if the NSF file, I was able to open my NSF file without the Lotus Notes. Just download the SysInspire application and avail all its features.
More info:- NSF to PST converter