I recommend using an automated utility to convert EML to PDF. I prefer and recommend using the EML converter (https://www.convertertools.org/eml-file-converter/) for this purpose. It lets users migrate their different EML data like mailboxes, events, address books to PDF. The tool converts EML data to various file formats like PST, PDF, MSG, HTML, etc. It also assists to import windows live mail data to Outlook, Gmail, Yahoo, IMAP, Thunderbird, etc. It also lets users convert Multiple EML files at one time.