https://woob.tech/applications/smtp, posted Jan '22 by peter in communication email free opensource software toread
Daemon application able to fetch messages from supported websites and send them by mail. It can also be used to send a reply to a message (on a module which supports this feature), by piping an email to it.
Looks like it should be possible to read (perhaps even write) private messages on Reddit without having to deal with Reddit's own, pretty terrible, web interface. Worth looking into.