Lotus Notes to Thunderbird Converter

Just get rid of such type of uncertainty, How do I convert Lotus Notes to MBOX format without making any interruption during file conversion process. NSF File format can support Lotus notes platform only but after converting from lotus notes to MBOX format one can access his database on different email clients. Credibility of the Lotus notes to thunderbird converter is that it provides the safe conversion from NSF to MBOX.