receive a protected email message with themessage.rpmsgfile attached, you can click the RPMSG file in Outlook to open the file (only while logged in to the email account that initially received the message). You can also selectFile → Openif you are using the desktop version of Outlook. ...
To open RPMSG file in Microsoft Outlook you need to launch it and then select File->Open... in the main menu Cited fromhttps://openrpmsgfile.com/ If this is helpful please accept answer. Please sign in to rate this answer. 1 person found this answer helpful. ...
This article helps you understand the scenario of how to use MIP File SDK to process .msg and .rpmsg files.