CR> I am also going to try to run it under emulation on y Rpi3.  Is
 CR> trapdoor available anywhere?

If you are running in emulator and have a shared filesystem between the
Amiga and the host you also have the possibility to run mailer and tosser
on the host system. I'm running Binkp and Crashmail in Linux and NiKom can
read the message base through the shared file system.

--- NiKom v2.3.1