Conditional notifications are available only to certain work or school accounts. A missing email can reflect eligibility, rule conditions, unsupported recipients, or an event that does not trigger the rule.
Check availability and recipients
On a computer, inspect Tools > Conditional notifications. If unavailable, confirm account eligibility with the administrator rather than assuming every personal or Workspace account includes it.
Google currently supports individual Gmail or Workspace recipient addresses, not group addresses or non-Google recipients such as Outlook or Yahoo. If recipients come from a range, its size must correspond to the monitored range.
Verify the actual trigger
Inspect the monitored column or cells and any additional condition. A format-only change, an external-source change such as IMPORTRANGE, or some volatile-function changes may not trigger the notification as expected.
Use a controlled eligible value change to test the rule. Do not send a large batch of artificial notifications to real recipients merely to investigate one missing event.
Review history without overstating delivery
Use View trigger history to inspect the available thirty-day record and any failed or partial runs. Google notes that successful runs do not necessarily mean an email was sent immediately, and undone changes may result in no notification.
Multiple changes can be consolidated. Check recipient mail handling separately after confirming the rule path. Review adjacent-cell information that may appear in notifications so the message does not expose unintended data. Record the test condition, intended recipient, history result, and delivery observation as separate facts rather than treating a successful trigger status as guaranteed receipt.
References
Reviewed against the linked official product guidance on November 3, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.