How can legitimately spoofed traffic be allowed to bypass the Anti-spoofing Policy?

In scenarios involving Anti-spoofing policies, it is crucial to manage legitimately spoofed traffic effectively to ensure that important communications are not inadvertently blocked. Both provided choices can facilitate this process.

Establishing an Anti-Spoofing Take No Action Policy with specific Hostnames allows traffic from those identified hosts to pass through without triggering the Anti-spoofing mechanisms. This approach is beneficial for organizations that may need to send emails on behalf of their domain from trusted external systems that would otherwise be flagged as spoofed, thereby maintaining important business communications.

Simultaneously, creating an Anti-Spoofing SPF Based Bypass Policy leveraging SPF (Sender Policy Framework) address lists enables legitimate source addresses, as identified through the SPF records, to bypass the Anti-spoofing checks. SPF is a method used to prevent spoofing by verifying that the sender's server is authorized to send emails on behalf of the domain.

Together, these methods provide comprehensive coverage for allowing legitimate spoofed traffic, as they encompass both specific hostname allowances and broader SPF criteria. This dual approach ensures that essential emails can bypass stringent checks, thus optimizing email delivery without compromising security.