Unvalidated sender domains create a significant security vulnerability that malicious actors can exploit to hijack your identity and perform email spoofing. If your environment allows domain addition without verification, unauthorized users might configure policies rules that compromise your organization's reputation and data security.

Domain Ownership Validation for Email DLP eliminates this risk by requiring a mandatory proof-of-control step for all sender domains when onboarding your email provider. Before you can activate a domain for forwarding or policy configuration, Enterprise DLP now verifies the email domain ownership through DNS TXT record validation. This ensures that only legitimate domain owners can add domains and manage traffic within your tenant. By enforcing strict ownership verification, you effectively prevent unauthorized domain usage, stop spoofing attempts, and maintain the integrity of your email security policies.