To add Outlook PST files to EML, you can try BitVare’s
PST Converter at free of cost to understand how to export PST files to EML file format. It can export PST files to EML with attachments, formatting, images, hyperlinks, etc. It supports directly converting configured Outlook data to EML with all data details and exporting orphan PST files to EML of any supported edition - 2021, 2019, 2013, 2016, 2010, 2007. It is easy to handle so anyone can handle it.