This detection rule aims to identify potential open redirect attempts related to Panera Bread that originate from external sources rather than the official Panera Bread domain. An open redirect is a vulnerability that can be exploited by attackers to redirect users to malicious websites by leveraging legitimate links from a trusted source. The rule scrutinizes inbound messages that contain links, particularly checking whether these links point to the subdomain 't.e1.panerabread.com' with a specific path that indicates a redirect. It raises an alert if the email sender does not belong to the official Panera Bread domain, thus flagging it as a medium severity threat potentially associated with credential phishing and malware attempts. The rule has been informed by prior mentions of such issues in online discussions, as documented in the provided reference.