DMARC & SPF record checker
Enter any domain to test its SPF, DKIM and DMARC records. You get a deliverability score, a grade, and the most urgent problems to fix — including the SPF 10 lookup limit that silently breaks authentication for a lot of senders.
Free, no sign-up. We read your public SPF, DKIM and DMARC DNS records — nothing is sent to your domain.
What is SPF?
SPF lists the servers allowed to send mail as your domain. Without it — or with a record ending in ~all instead of -all — anyone can spoof you more easily, and receivers trust your mail less.
What is DKIM?
DKIM signs your mail cryptographically so receivers can prove it really came from you and was not altered on the way. It is also what lets your mail survive forwarding.
What is DMARC?
DMARC tells receivers what to do when SPF and DKIM fail, and sends you reports about who is sending as your domain. A policy of p=none only monitors — it does not stop spoofing.
Fixing the records is only half the job
Authentication gets you accepted; a clean list gets you into the inbox. Validate your addresses before you send, and keep campaigns, transactional email and validation in one place.