This rule detects suspicious Firebase password reset emails that may indicate an attempt to exploit the Firebase authentication service. It specifically targets password reset messages originating from the domain 'firebaseapp.com' based on several parameters. The rule flags messages that include links pointing to Firebase actions if the sender is either new and unsolicited, or if they have previous malicious or spam reports without benign messages. Additionally, it checks the validity of the sender's domain and the presence of a valid DMARC policy. A valid match must show exactly one link that meets specific criteria, thus reducing false positives from legitimate sources and confirming the intent of the sender.