> I definitely struggle to understand why IMAP IDLE is critical for a release.
The functionality is present in the latest stable version, but needs to be reimplemented in the new version. As a user I would be upset if the app was updated and that feature taken away, even if it was only temporary.
I am not using the beta version of K-9. I was able to make it work mostly correctly on Android 11 by setting it to "Not Optimized" in the battery power permissions. That will allow it to run in the background. It seems to be able to use IDLE and to also run its periodic polling that way. Otherwise I would open K-9 and it would be hours out of date.
The functionality is present in the latest stable version, but needs to be reimplemented in the new version. As a user I would be upset if the app was updated and that feature taken away, even if it was only temporary.