DMARC, SPF ,NAC, DKIM

C. DMARC DMARC (Domain-based Message Authentication Reporting and Conformance) specifies the disposition of spam emails. The legitimate owner of the originating email domain can choose to have these messages accepted, sent to a spam folder, or rejected. The incorrect answers:

A. SPF SPF (Sender Policy Framework) is a list of all authorized mail servers for a specific domain. All legitimate emails would be sent from one of the servers listed in the SPF configuration.

B. NAC NAC (Network Access Control) is a way to limit network access to only authorized users. NAC is not commonly used to manage the transfer of email messages.

D. DKIM DKIM (Domain Keys Identified Mail) provides a way to validate all digitally signed messages from a specific email server. DKIM does not determine how the receiving server categorizes these digitally signed messages.