Why Is DMARC Important?

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is essential for protecting your domain from spoofing and phishing attacks. It helps prevent attackers from impersonating your business, safeguards your brand reputation, and improves email deliverability.

DMARC provides visibility into who is sending email on your behalf and allows you to instruct receiving mail servers on how to handle messages that fail authentication.

Why DMARC Is Important

Prevents Phishing and Spoofing
DMARC blocks unauthorized parties from sending email that appears to come from your domain (e.g., ceo@yourcompany.com), reducing fraud and business email compromise (BEC) risk.

Improves Deliverability
Major mailbox providers such as Google and Yahoo require DMARC for bulk senders, with Microsoft following suit. Properly configured DMARC strengthens authentication signals and reduces the risk of legitimate mail being filtered.

Provides Visibility Through Reporting
DMARC aggregate reports show all sources sending mail using your domain, helping you identify legitimate services and detect unauthorized use.

Protects Brand Reputation
By stopping fraudulent messages before they reach recipients, DMARC prevents your domain from being associated with scams or abuse.

Enforces Authentication Alignment
Working alongside SPF and DKIM, DMARC shifts email security toward a "trust verified senders" model instead of relying solely on spam filtering.

Popular inboxes like Google and Yahoo require DMARC for bulk senders (5,000+ daily sent emails), making it mandatory for business continuity. Microsoft has since joined those two providers by requiring DMARC.

Becoming DMARC compliant is critical to your business for maintaining a secure and trusted email domain.