What this tool checks
DMARC tells receiving servers what to do with email that fails SPF and DKIM, and where to send reports. This checker reads your DMARC record, shows the policy (none, quarantine, or reject), flags a missing reporting address, and presents it with your SPF and DKIM so you can see whether your email is actually protected. A policy of reject or quarantine is what stops spoofing; p=none only monitors.
Frequently asked questions
What's the difference between p=none, quarantine, and reject?
p=none takes no action and only collects reports (a monitoring phase). p=quarantine sends failing mail to spam. p=reject blocks it outright. Reject is the strongest and the goal for a protected domain.
Where does DMARC live in DNS?
As a TXT record at _dmarc.yourdomain.com, starting with v=DMARC1. This checker looks there automatically when you enter your domain.
Do I need SPF and DKIM for DMARC to work?
Yes. DMARC builds on SPF and DKIM. It decides what happens when those checks fail and confirms the From address aligns. This tool shows all three together so you can spot gaps.