

Seconding fetchmail. It’s configuration is quite elaborate for a whole bunch of situations. I’ve used it in a small office situation to pull email from their legacy ISP’s POP into an internal IMAP server, so they could have multiple clients sharing mailboxes. (And so they couldn’t set weak passwords on an internet-connected system :-/ )
I have a bunch of ESP32’s that … I can update and replace the firmware on, if i reset it the right way with a usb cable. the web site doesn’t explain it any way how this is any worse than that…?