DMARC Record Checker
Look up the DMARC record for any domain. See whether the policy is enforced, where aggregate reports go, and what to fix before you tighten it.
What a DMARC record does
DMARC is a TXT record published at _dmarc.yourdomain.com. It ties SPF and DKIM together, tells receiving servers what to do when a message fails authentication, and asks them to send you reports.
This checker reads the DMARC record at that name and explains the policy. For the full breakdown, read what is DMARC.
Reading the policy
The p= tag is the policy. none only monitors and does not stop spoofing. quarantine sends failing mail to spam, and reject blocks it outright.
Start at p=none with an rua reporting address, read the reports until legitimate mail passes, then move to quarantine and finally reject.