NSF to PST converting can be exported easily with the help of a standard tool named eSoftTools NSF to PST Converter. This software accurately imports the raw data from NSF files to outlook PST without losing any data and also the folder structure of Lotus Notes. Incidentally, if you want to take even more control on what gets filtered and exported, you can do so with regards to mail of a certain date and range.
More Info: Free NSF to PST Export
More Info: Free NSF to PST Export