DMARC checker & generator
Check an existing DMARC record, or build a new one to publish - the policy that stops attackers sending email as you.
Check your record
Enter a domain to see whether it has a DMARC record and what its policy is.
Build a record
Set your options and we’ll build a valid DMARC record for you to publish. Start in monitoring mode, then tighten as you go.
Publish this as a TXT record at _dmarc.yourdomain.com
What this tells you
A DMARC record at _dmarc.yourdomain.com tells receivers what to do with mail that fails authentication. No record means anyone can spoof your domain with impunity. A record with p=none only monitors; p=quarantine or p=reject is real protection. This tool confirms the record exists – a full check grades the policy and the rest of your posture.
What is DMARC? →
The basics, in plain English.
Get to p=reject →
Reach enforcement without breaking mail.
SPF checker →
Check the record DMARC relies on.