To batch convert EML to PDF with attachments I would recommend you to use Advik EML to PDF Converter on your system. Using this software you can quickly perform EML to PDF conversion without any external help.The tool has a dual mode to convert single or multiple EML files at once. It preserves data integrity and email structure as well during the process. It provides 100% secure conversion and it also provides a preview option. This software supports all Windows OS versions like Windows 10, 8.1, 8, 7, XP, Vista, etc.