No DMARC record: what it means and how to fix it
If a checker reports "no DMARC record," it means your domain has not published a DMARC policy at _dmarc.yourdomain.com. Receiving servers therefore have no instruction on what to do with mail that fails authentication — so attackers can spoof your domain, and bulk senders risk being filtered to spam. The fix is to publish a DMARC TXT record, starting in monitor mode (p=none) and tightening to p=reject.
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Why "no DMARC record" is a problem
Without DMARC, SPF and DKIM still exist but nothing ties them to a policy. A receiver that sees a forged message has no published instruction from you, so it falls back to its own heuristics — which increasingly means rejecting or spam-foldering bulk mail. Since February 2024, Google and Yahoo require a DMARC record for senders of roughly 5,000+ messages per day, and Microsoft extended similar expectations to Outlook.com in 2025.
How to fix it — step by step
First, confirm SPF and DKIM are in place for every service that sends as your domain. Then publish a DMARC TXT record at _dmarc.yourdomain.com, beginning with "v=DMARC1; p=none; rua=mailto:you@yourdomain.com" to collect reports without affecting delivery. After a week or two of clean reports, raise the policy to p=quarantine, then p=reject to actively block spoofing.
A practical example record
A common starting record looks like: v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com; fo=1. Once your legitimate mail passes consistently, the enforcing version is: v=DMARC1; p=reject; rua=mailto:dmarc@yourdomain.com. VeruMail generates the exact record for your domain and watches it so you are alerted if it ever changes or breaks.
Frequently asked questions
Is no DMARC record dangerous?
Yes — it lets attackers send phishing email that appears to come from your domain, and it increasingly causes your legitimate bulk mail to be filtered to spam.
How long until DMARC starts working?
DNS changes typically propagate within minutes to a few hours. You start receiving DMARC aggregate reports within 24–72 hours of publishing the record.
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