If you are looking to convert MBOX files to EML format in bulk, you might want to try the
eSoftTools MBOX Converter software. It allows you to convert MBOX files into various formats—including PST, EML, MSG, EMLX, HTML, and NSF—while offering a range of excellent features. The tool also provides a live preview of MBOX emails and can be downloaded and tested on any Windows-based system.
Read More:- Convert MBOX to EML files in Bulk