DMARC allows domain owners to instruct inbox providers how to handle messages that fail SPF and DKIM checks while providing detailed reporting.
It builds on authentication foundations to reduce spoofing and improve trust in legitimate messages.
Attackers can spoof your domain name regardless of how you send legitimate email. DMARC gives you a way to clamp down on that abuse.
When you also send authenticated website email through managed SMTP routes, DMARC helps inbox providers see those messages as the real thing.
GuardianSend ensures the SMTP paths we use for website traffic are compatible with your DMARC policies.
A safe DMARC rollout typically starts with a monitoring policy (p=none), then gradually moves towards quarantine and reject.
For many small businesses, website email is a manageable starting surface—you can fully align that traffic and then expand.
GuardianSend configures website-related DNS records and reviews DMARC reports to keep the enforcement process safe and effective.
If you would rather not debug headers, DNS, and SMTP yourself, GuardianSend can take over website email routing and authentication for you. Visit our Services page or contact us.