The most reliable way to convert NSF data to MBOX is the Aryson NSF to PST Converter tool. It converts single or multiple NSF files to other file formats like PST, EML, MBOX, MSG, and PDF. The utility exports the entire Lotus Notes mailbox items including email messages, contacts, and calendars. If you want to migrate the Lotus Notes data to other email clients, then this tool can help you. It migrates the NSF data to Office 365, Gmail, and Yahoo.

Read more: https://www.arysontechnologies.com/convert-nsf-to-pst/