Using k-9 for a while here, but in this New xiaomi phone I can’t figure how tô ver notification of New messages each fixed amount of time. It is set to check each 15 minutes and It only does this when i open k-9 and leave it “in the background”. The push foder option works fine, but it seems to drain the battery more than it should.
The other thing is on the OpenKeyChain integration that no longer works here, but os perfect in the old version installed on my Motorola G4 plus.