Symptom. Some users receive emails while others do not, or routine emails stop arriving while critical ones still come through.
Cause. Calm Mode suppresses notification email at four levels (Off, Calm, Calmer, Calmest) while keeping in-app inbox notifications instant. Per-category and per-channel preferences can also disable email for specific notification kinds.
Fix.
Ask the affected user to open Settings > Notifications (Personal) and check their Calm Mode level.
Look for notification kinds with a Calm badge next to an unticked email checkbox. Tick the checkbox to override suppression for that kind, or click Following Calm · Reset to restore the default behavior.
Check Channel preferences. If a channel is set to Required, the user only receives mandatory notifications on that channel.
Remember that the Outstanding Items Summary always sends by email regardless of Calm Mode.
For a full breakdown of what each Calm Mode level suppresses, see Calm Mode. For detailed preference controls, see Configuring Notification Preferences.