Here it is: https://github.com/k9mail/k-9/issues/857 https://github.com/k9mail/k-9/issues/857 The issue is even older than I thought, though I was pretty sure

Here it is: https://github.com/k9mail/k-9/issues/857 https://github.com/k9mail/k-9/issues/857 The issue is even older than I thought, though I was pretty sure the requirement for a notification specifically appeared around Android 8 or 9. Also, seeing as K9 doesn't look to be anywhere near frequently updated, I'm not expecting this to change soon.