If you want to import EML into MBOX, you should use the eSoftTools EML to MBOX Converter tool. It has amazing features that allow you to convert EML to a variety of file formats, including EMLX, MSG, MBOX, HTML, MHTML, Gmail, and OFFICE 365, among others. It can convert single or bulk EML files to MBOX or other formats. It offers a free trial version that allows users to convert up to 25 items from EML to MBOX and other formats.
Read More:- Import EML into MBOX