It checks a domain's MX records (mail servers), SPF, DKIM and DMARC configuration. This tells you if the domain can receive email, and whether it has anti-spam/spoofing protection set up. A score of 80+ means the domain is well-configured.
Yes. All 28 tools are free to use through the web interface. No signup, no ads, no tracking cookies.
Pro (€9/month) gives you API access — call our endpoints programmatically from your own scripts and apps. 1,000 API calls/day, JSON responses, rate limit 10/sec. Perfect for bulk email verification, DNS monitoring or integrating into your CI/CD pipeline.
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A, AAAA, MX, TXT, NS, CNAME, SOA — or use "All Records" to get everything at once.
Most likely: missing SPF, DKIM or DMARC records. Without these, Gmail and Outlook flag your emails as suspicious. Run our email checker on your domain — if score < 70, you have configuration issues.
No. We use privacy-friendly analytics — anonymous pageview counts only. No IP addresses stored, no cookies, no query logging.
Yes! Reach out at hello@korpo.pro or request API access via the access form.