Is There a Safe Method to Convert MBOX to NSF Format?

I have several emails stored in MBOX format and need to use them in Lotus Notes, which supports NSF files. I am concerned about losing data, corrupting emails, or facing compatibility issues during conversion. What is the safest and most reliable way to convert MBOX files to NSF format without any data loss? Are there recommended tools or methods that professionals use for this kind of migration?