Office2SharePoint saved email as EML file.
EML (Electronic Mail) is a standard file extension format supported by various email clients. This file format is widely used to store email messages for its versatility and compatibility. An EML file contains the complete content of an email, including text, attachments, and metadata. Notice, how you open an EML file from SharePoint is controlled by your device. You can set it up to open EML files in Outlook client or web browser.