flow-can-invoke-email-alerts-bypassing-workflow-rules
Salesforce Email Alerts are not exclusively triggered by WorkflowRules — Record-Triggered Flows can invoke the same Email Alert actions. When auditing what fires a specific email, querying all WorkflowRules is insufficient; active Flows (especially RecordAfterSave on Task/Activity objects) must also be checked. The Task_Send_Email_Alerts flow in the Runwal org follows this pattern for Presales RNR emails.