Which of the following email authentication standards allows domain owners to control who sends on behalf of their domains?

The correct response highlights that all the listed email authentication standards—DKIM, DMARC, and SPF—play pivotal roles in enabling domain owners to manage and control who can send emails on behalf of their domains.

Starting with SPF (Sender Policy Framework), it allows domain owners to publish a list of authorized mail servers. This means domain owners can specify which servers are permitted to send emails for their domain, thereby preventing unauthorized senders and reducing the chances of email spoofing.

Moving to DKIM (DomainKeys Identified Mail), this standard provides a way for senders to digitally sign their emails, ensuring that the email content remains intact during transit and confirming that it was indeed sent by the claimed domain. While it doesn't directly control who sends emails, it enhances verification and trust in the authenticity of the email.

DMARC (Domain-based Message Authentication, Reporting & Conformance) builds on both SPF and DKIM. It allows domain owners to create policies that specify how email receivers should handle emails that fail SPF or DKIM checks. This means domain owners can enforce stricter controls and receive reports when issues arise, thus providing a robust framework for protecting their domains from misuse.

By implementing all three standards together, domain owners gain comprehensive control over their email sending practices