A DNS health check examines every critical aspect of your domain's DNS configuration. It verifies that your nameservers are properly configured and distributed across different networks for redundancy, checks your SOA record for recommended timing values, confirms your A and AAAA records resolve correctly, and inspects your MX mail server records. Most importantly, it audits your email authentication setup: SPF records that authorize your sending servers, DMARC policies that protect against spoofing, and DKIM signing keys that verify message integrity. DNS misconfigurations are one of the most common causes of email deliverability problems, website downtime, and SEO issues.
Enter your domain name and click "Run DNS Check." The tool queries DNS servers for every important record type and evaluates each one against best practices. Results are organized into sections with pass, warning, and fail indicators. The overall score at the top gives you a quick snapshot of your DNS health. Green checks mean a record is properly configured, yellow warnings suggest room for improvement, and red X marks indicate missing or misconfigured records that should be addressed.
The most impactful checks to pay attention to are SPF, DMARC, and DKIM. If any of these are missing, your email is significantly more likely to land in spam folders or be rejected entirely. A good baseline is at least two nameservers on different networks, a valid SOA with standard timing values, MX records pointing to your mail server, an SPF record authorizing your sending IPs, and a DMARC policy set to at least "v=DMARC1; p=none" to start collecting reports. Run this check after any DNS changes to verify everything looks correct.
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