SPF Checker
Validate SPF syntax, policy and DNS lookup limits.
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Tools Server
Free online tools for server, network, website, email and security.
Fast, accurate and easy to use.
All systems operational
Core Tools Free
Authority metrics may require provider API credentials.
Email Security Checker RECOMMENDED
Check SPF, DKIM, DMARC, MX records and email configuration of your domain in one place.
Check Results
Enter a domain and click “Check Now” to see the results.
SPF−
Not checked
DKIM−
Not checked
DMARC−
Not checked
MX Record−
Not checked
Security Score−
Not checked
Email Tools
DKIM Checker
Verify a DKIM public key using its selector.
DMARC Checker
Review DMARC policy, alignment and reporting tags.
SEO Tools
Analyze keywords, on-page SEO and third-party authority metrics without leaving Kusworo.com.
SEO ANALYSIS
SEO Tool
Other Server Tools
Server Tool
How to use Email Security Checker
- Enter the domain you want to check, such as example.com.
- Optionally enter the DKIM selector. Leave it empty to test common selectors.
- Click “Check Now” to analyze the important email authentication records.
- Review the results and recommendations, then fix any detected issues.
💡 Tip: After changing DNS records, wait 5–30 minutes or the provider’s stated TTL before checking again.
Why Email Security Matters
- Protect your domain from spoofing and phishing.
- Improve email deliverability and sender reputation.
- Give receiving servers clearer authentication signals.
- Use DMARC reports to monitor unauthorized mail sources.
- Build trust with customers and business partners.
🎁
Core Tools FreeKeyword and on-page checks need no account.
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Fast & AccurateReal-time checks with resolver fallbacks.
🔒
Private & SecureQueries are not stored by the theme.
👍
Easy to UseA clean interface for technical and non-technical users.