"Couldn't connect to host, port" (DNS Cache Problem)
I managed to get Simple Email in a state where it seems to have cached a bad DNS record for my server.
Couldn't connect to host, port: connect.uwaterloo.ca, 993; timeout 60000 connect.uwaterloo.ca
The same account details from the same phone with k9 Mail worked, however:
And rebooting made it work in Simple Email:
I haven't figured out how to reproduce this yet. My best theory is that, in an unrelated bug, my router reboots overnight and this confuses my phone to make it think it's connected but without actually being able to receive packets until I disable and reenable its wifi; so maybe I tried to set up this account with Simple Email in that state, but then it was still like that 5 hours later.
Edited by Nick