In general, K9 works fine on my Sony Xperia 1 III (Android 12). But at least once a week it happens, that e-mails are only retrieved when i open the k9 app. all the other days everything is fine, push and notifications work well. does anybody know this issue - and does a workaround exist? I checked all settings and they seem to be allright - i.e. the app itself is excepted from battery saving mode.
battery usage in the background without restrictions is allowed. or do you mean other settings? if yes, where can i find them?
what is crazy - there is no regularity: for a couple of day, sometimes for a week, everything is fine. then, after a few days, i recognize in the morning, that there is no letter icon in the android notification bar. in this case, i have to open the k9 app, and then immediately all mails are retrieved.