Many users import NSF files into Outlook without any errors, so I suggest the best conversion tool in the world this called eSoftTools NSF to PST converter software. It can easily import Lotus Notes NSF files to Outlook PST and MBOX, EML, MSG, ICS, Yahoo Mail, Gmail, Office 365, vCard, EMLX, etc. it has a splitting option that allows splitting a large PST file into multiple small sizes PST file in one click.
