EML and PST are two of the widely used email file formats, but they belong to different ecosystems. EML files are usually produced by email clients such as Windows Live Mail, Mozilla Thunderbird, and Outlook Express, whereas PST files are utilized only by Microsoft Outlook for storing emails, contacts, calendars, and similar data. https://indibloghub.com/post/how-to-convert-eml-to-pst-for-free-best-tools-and-step-by-step-guide