How Can I Convert NSF Files to MBOX Format?
I recently switched from Lotus Notes to Thunderbird and need to convert some old NSF files to MBOX format. Does anyone know a reliable tool or method to do this without data loss?

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Genesis commented
Bothered by manual hard work, leave it and try the fastest and efficient solution and get your multiple NSF files converted into a MBOX file. Use an efficient NSF to MBOX Converter solution. It is one of the best solutions to directly migrate Lotus Notes NSF files to MBOX without having data loss. With advanced conversion features, the NSF Converter allows users to convert unlimited NSF files. It is straightforward to install on your desktop. It also provides a free testing version.
get more info: https://www.softaken.com/nsf-to-mbox-converter