Free Email Authentication & DNS Record Tools
Email deliverability depends on correct DNS records. Missing SPF or DKIM signatures, weak DMARC policies, and misconfigured MX records cause messages to land in spam - or fail entirely.
Our email and DNS tools parse authentication records for any domain - SPF, DKIM, DMARC, BIMI, MX, CAA, and PTR lookups. Compare DNS configurations between domains or audit records before migrating mail providers.
Use these checkers when setting up Google Workspace, Microsoft 365, or any custom mail server. All tools are free with instant results.
8 free email & dns tools
Email Blacklist
Check mail server IP blacklists.
SPF/DKIM Checker
Verify email authentication records.
MX Record Checker
Detailed MX record analysis.
DMARC Analyzer
Parse DMARC record and policy.
BIMI Checker
Check BIMI brand email records.
DNS Record Comparer
Compare DNS between two domains.
CAA Record Checker
Check CA Authorization records.
PTR Record Checker
Reverse DNS PTR lookup.
Email & DNS Tools FAQ
Related blog guides
Deep-dive articles that complement these free tools.
Help & how-to guides
Step-by-step answers for domain, DNS, and security tasks.
More free tool categories
Research domains with free WHOIS lookup, DNS checks, domain age, subdomain discovery, and TLD info tools. No signup required.
Audit title tags, headings, alt text, canonicals, hreflang, internal links, and more with free on-page SEO checkers. Instant results, no signup.
Test page speed, Core Web Vitals, HTTP/2, compression, redirects, and crawlability with free technical SEO tools. No registration needed.
Analyze meta tags, robots.txt, sitemaps, keyword density, backlinks, schema markup, and readability with free SEO content tools.
Validate Twitter Cards, preview Open Graph tags, find RSS feeds, and audit social links on any page. Free social SEO tools, no signup.
Audit SSL certificates, security headers, malware, vulnerabilities, CSP, CORS, and TLS with free website security scanners. No account needed.
Look up IP geolocation, ISP details, and network information with free network diagnostic tools. Instant IP lookup, no registration.
Need a domain for your project?
Search hundreds of TLDs and register your perfect domain at competitive prices.
Search Domains