Do you have problems in FairEmail?
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I used to use FairEmail, but one of my email providers (a school using Microsoft 365) blocks FairEmail. So I haven't tried it with this watch.
Could you use it to test the notification issue or would you need that Microsoft 365 account?
I could, but I'm not asking about the bug here; I'm asking about allowing K-9 to use alarms and reminders like the release notes said.
Sorry, I know that was a little left-field but I was trying to ascertain whether your issue is just K9 or all email as the alarms and reminders thing has nothing to do with your mail notifications