SPF & DKIM Email Record Syntax Validator
Catch email authentication errors before they cause deliverability problems.
Paste your record
The raw TXT record value, exactly as published in DNS.
Analysis
No syntax issues found.
DNS lookups used: 1 / 10
About this tool
Paste a raw SPF or DKIM DNS record and get instant, client-side validation against the actual RFC standards — including the critical 10-DNS-lookup SPF limit, missing required tags, malformed IP addresses, and invalid base64 in DKIM public keys.
How to use SPF & DKIM Email Record Syntax Validator
- 1
Switch between SPF and DKIM depending on which record you're checking.
- 2
Paste the raw TXT record value exactly as published in your DNS.
- 3
Review any errors (must fix) and warnings (worth checking) listed below.
- 4
For SPF, watch your DNS lookup count — exceeding 10 causes a hard failure.
Frequently asked questions
Related tools
JSON Tree Formatter & Syntax Validator
Turn messy or broken JSON into a clean, color-coded tree.
WCAG Typography Readability Checker
Check if your text and background actually pass accessibility standards.
CSS Grid & Flexbox Live Layout Playground
Adjust sliders, watch the layout update, copy the CSS.