I am suggesting you to download SysInspire NSF Converter Software which works with Lotus Notes File as well as Export NSF emails from NSF file into PST file and another workable file format.
This NSF to PST converter tool offers users to convert NSF to PST, MSG, EMLX, EML, and HTML with all E-mail properties and other data.
It supports all Lotus Notes and MS Outlook versions including- 5.0, 5.5, 2000, 2003, 2007, 2010, 2013 and 2016.
This tool gives live preview of all mailbox items of the NSF file before conversion and saves the NSF mailbox elements without any issue.
More info:- Best NSF to PST converter software