plutoemail
Email reader for RISC OS operating system.
Pluto is an email and newsgroup reader for the RISC OS operating system (see https://www.riscosopen.org/), developed by Jonathan Duddington from 1997 to 2004. It stores emails and news articles in Boxes, and they can be Listed, Viewed, Written, Spell checked, Replied to, Searched and even Spoken out loud!
After Pluto was released under GPLv3 here on SourceForge in 2013, it has had many improvements.
Pluto runs on any version of RISC OS later than v3.10, including RISC OS 5 computers...