This rule is designed to detect open redirect attempts via Google Ad Services links in email messages. An open redirect vulnerability occurs when a web application accepts a untrusted input that redirects a user to an unintended site. The specific detection focuses on the use of links that direct to `googleadservices.com` but originate from a non-Google sender's email. The rule checks for the presence of URLs that contain the specified Google Ad Services path and query parameters indicating a redirect, while also confirming that the sender's domain is not `google.com`. The exploitation of this type of link can lead to credential phishing and malware distribution, as malicious actors can use these redirects to mask their true intentions. The rule employs sender analysis and URL analysis to inform potential security alerts.