We have found 2 software records in our database eligible for .rpmsg to .eml file format conversion.
Using Microsoft Outlook or similar email management software it should be possible to convert various types of email messages, including .rpmsg (restricted permission message) and standard .eml files, simply by importing the former and saving it in the later format.
However, working with .rpmsg files requires to have proper permissions and you won't be able to access files that are not meant for you.
Mac version of the popular e-mail client and personal information manager from Microsoft
RPMSG
Files with rpmsg file extension are mainly related to the Microsoft Restricted Permission Message file format. Used for secured e-mailing purposes.
EML
An eml file extension is used by various e-mail clients, such as Microsoft Outlook, Windows' default mail client, Thunderbird, etc. An eml file contains saved email messages either meant as backup or for sharing.