Free SPF/DMARC/DKIM Checker Online
Lookup SPF, DMARC, and DKIM TXT records via DNS-over-HTTPS.
Uses DNS-over-HTTPS (Cloudflare). No data stored. Ready for server-side SMTP tests later.
No SPF record found
No DMARC record found
No DKIM records found
SPF
MissingNo records found
DMARC
MissingNo records found
DKIM
MissingNo records found
What this checks
- SPF: one TXT record that lists allowed senders. Only one SPF record is allowed—combine if you have more.
- DMARC: policy at
_dmarc.yourdomaintelling receivers what to do if SPF/DKIM fail. - DKIM: per-selector TXT records (e.g.,
selector1._domainkey) with public keys.
Common fixes
- SPF PermError? Remove extra SPF TXT records and merge them into one.
- No DMARC? Add
v=DMARC1; p=quarantine; rua=mailto:reports@yourdomain. - No DKIM? Use your mail provider’s selector (e.g.,
selector1,google) and add their TXT.
Tips
- Try multiple selectors separated by commas (e.g.,
selector1,google,mail). - Propagation can take time; recheck after DNS updates.
- For SMTP/banner/blacklist checks, we can add server-side tests later.
Privacy: All processing is done client-side; nothing you type or generate is sent to any server.
Monetization: We show light, non-intrusive ads to keep these tools free for everyone.
How It Works
- Enter domain name
- Query DNS records via HTTPS
- View SPF, DMARC, DKIM records
- Verify email authentication setup
When to Use This Tool
- ✓Setting up email authentication
- ✓Troubleshooting email delivery
- ✓Verifying domain security
- ✓Email security audits
Use Cases & Examples
- •Email deliverability troubleshooting
- •Domain security configuration
- •Anti-spoofing verification
- •Email server setup
Frequently Asked Questions
What are SPF, DMARC, and DKIM?
Email authentication protocols that verify sender identity and prevent email spoofing.
Why check these records?
Ensures your emails are authenticated properly and less likely to be marked as spam.
Is DNS-over-HTTPS secure?
Yes, queries are encrypted for privacy and security.
📚 Related Articles
Learn more about using this tool effectively:
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