sender rewrite scheme

The sender rewrite scheme (SRS) is a Microsoft 365 email feature that cybercriminals are exploiting in phishing attacks. Recent discussions on WindowsForum highlight how attackers leverage SRS to make fraudulent emails appear legitimate, particularly in campaigns targeting PayPal users. This technique bypasses traditional email verification systems, making it harder for recipients to detect malicious messages. The tag covers the abuse of SRS in phishing, its role in email security, and the challenges it poses for Microsoft 365 administrators and users. Topics include attack methods, detection difficulties, and potential mitigations within the Microsoft 365 ecosystem.