Do you want to learn how to batch EML file to PST format? Then, I want to suggest you to try CubexSoft EML to PST Converter to convert batch EML file...
One can get help from CubexSoft OLM Converter for Mac to export OLM files to PST, PDF, EML, MSG, MBOX, ICS, CSV, vCard, TXT, HTML, DOC, Thunderbird,...