DMARC: Protecting Your Domain from Spoofing
DMARC ties SPF and DKIM together and tells receiving servers what to do when a message claiming to be from your domain fails those checks. It is the policy layer that turns email authentication into real protection against spoofing and phishing.
Without DMARC, even with SPF and DKIM in place, you are not telling the world how to treat forged mail. With it, you take control of your domain's reputation.
What DMARC Decides
A DMARC record sets a policy for failing messages and asks receivers to send you reports about mail using your domain.
- None: monitor only, take no action — a safe starting point.
- Quarantine: send failing mail to the spam folder.
- Reject: refuse failing mail outright, the strongest protection.
Rolling It Out Safely
We never jump straight to a strict policy. Doing so risks blocking your own legitimate mail.
- Start with a monitoring policy and gather reports.
- Identify every legitimate sender from the reports.
- Fix any gaps in your SPF and DKIM setup.
- Gradually tighten to quarantine, then reject.
Frequently Asked Questions
Is DMARC worth the effort for a small business?
Yes — it protects your brand from being used in phishing scams and improves the deliverability of your genuine mail.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.