All tools
SPF, DKIM & DMARC checker
Enter your domain to check your email authentication and mail routing. Everything runs in your browser — we don't store anything.
Common questions
- What does this tool check?
- It looks up your domain's MX records, SPF record, DMARC policy and DKIM key (on common selectors), then tells you what's configured and what's missing.
- Why do SPF, DKIM and DMARC matter?
- Together they prove your email is genuinely from you. Without them, mailbox providers are far more likely to send your mail to spam, and others can spoof your domain.
- It says no DKIM found — is that wrong?
- DKIM keys live on a 'selector' that varies by provider. We try common selectors automatically; if yours is custom, enter it in the selector box and re-check.
New to this? Read SPF, DKIM & DMARC explained and DMARC policies explained.