The file which is created for every individual mail in Microsoft Outlook and MS Exchange is known as MSG File. Microsoft Outlook stores every individual Outlook Emails (contains Email fields, sender, date, subject, recipients, etc.) as .msg file type format. MSG File is based on CFB (Compound File Binary) Format & requires a MAPI (Message Application Program Interface) familiar application to view the storage. It contains plain ASCII text for the header and main message body as well as hyperlinks and attachments.