This detection rule monitors for failed attempts to send email notifications associated with Auth0, which could signify potential issues including misconfiguration or malicious attempts to disrupt security notifications, such as password resets. By identifying events that include the phrase 'Failed to send email notification', the rule flags instances where security-related communication utilized by the application is compromised, potentially indicating an attempt to suppress alerts or modify email delivery settings. The logic specifically filters results for events matching the function name 'fn' and collates relevant details such as the timestamp, host, user involved, and geographical location. The output is aggregated over one-second intervals, which allows for a concise view of events over time, aiding in the identification of patterns or spikes in failures that could suggest an ongoing attack or misconfiguration. This rule is critical for maintaining the integrity of communication in security-sensitive applications.