Question 1

What is DMARC?

Accepted Answer

DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol defined in RFC 7489 that builds upon SPF and DKIM to provide protection against email spoofing and phishing attacks.

Question 2

What are RUA and RUF reports?

Accepted Answer

RUA (Aggregate Reports) provide daily summaries of email authentication results, while RUF (Forensic Reports) provide real-time failure reports with message samples when DMARC authentication fails.

Question 3

How does DMARC prevent phishing?

Accepted Answer

DMARC prevents phishing by authenticating email messages using SPF and DKIM, then applying policy actions (none, quarantine, or reject) to messages that fail authentication, preventing spoofed emails from reaching recipients.