The R file extension is related to the Pegasus Mail resource file format.
R file extension - Pegasus Mail resource file
What is r file? How to open r files?
File type specification:
The R file extension is associated with Pegasus Mail an e-mail client developed for Novell and MS-DOS later for Microsoft Windows operating systems. The *.r file stores some kind of resources used by Pegasus Mail.
The default software associated to open r file:
Company or developer:
David Harris
Pegasus Mail is one of the Internet's longest-serving PC e-mail system used on Windows.
List of recommended software applications associated to the .r file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open r file, edit r file, convert r file, view r file, play r file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with r file - Pegasus Mail resource file
Click on the software link for more information about Pegasus Mail. Pegasus Mail uses r file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).