Email authentication
91.221.165.126 email authentication
Combined SPF, DMARC, and DKIM validation for this domain.
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- SPF ValidatorSame targetValidate SPF TXT records, mechanisms and terminal all91.221.165.126Open
- DMARC AnalyzerSame targetDMARC policy, alignment and reporting checks91.221.165.126Open
- DKIM ValidatorSame targetDKIM selector lookup and record validation91.221.165.126Open
- DNS CheckerSame targetAll major record types in one pass91.221.165.126Open
- DIGSame targetOne record type, resolver-style answer91.221.165.126Open
- Domain IP LookupSame targetA and AAAA IP addresses for a domain91.221.165.126Open
- Domain Age CheckerSame targetCreation date, age, registrar and expiry91.221.165.126Open
- WHOISSame targetRegistrar, expiry and domain status91.221.165.126Open
- HTTP Header CheckerSame targetResponse headers, redirects and caching91.221.165.126Open
- HTTP/2 TesterSame targetHTTP/2 support, ALPN and TLS negotiation91.221.165.126Open
- SSL Certificate CheckerSame targetCertificate chain, SAN and TLS version91.221.165.126Open
- Blacklist CheckerSame targetDNSBL reputation for IP and domain91.221.165.126Open
- Punycode ConverterSame targetUnicode ↔ Punycode for IDN domains91.221.165.126Open
- URL SplitterSame targetBreak a URL into parts and query paramshttps://91.221.165.126/Open
- Base64 CodecEncode and decode Base64 textOpen
- Password GeneratorStrong random passwords for ops workOpen
- Password Strength CheckerEntropy, crack time and password suggestionsOpen
- Passphrase GeneratorMemorable random word phrases for safer sharing testsOpen
- BIN CheckerCard brand, bank and country from BIN/IINOpen
- IP CalculatorSame targetSubnet math for IPv4 and IPv6 CIDR91.221.165.126Open
- Browser Update CheckerBrowser version, update status and Client HintsOpen
Guides
Related articles
Practical guides for common Email Auth Checker tasks — DNS records, troubleshooting steps, and links to our free tools.
spf dkim dmarc stack, email auth checker, spf dkim dmarc
SPF, DKIM, and DMARC together
SPF, DKIM, and DMARC together. Email Auth Checker runs SPF at the domain apex, DMARC at _dmarc.<domain>, and DKIM for each selector you provide in one coordinated report. Shareable result URLs keep domain and optional selectors in the query string so support teams can reopen the same audit without retyping.
Read article →combined email auth audit, email auth checker, spf dkim dmarc
Combined email authentication audit
Combined email authentication audit. Email Auth Checker runs SPF at the domain apex, DMARC at _dmarc.<domain>, and DKIM for each selector you provide in one coordinated report. Shareable result URLs keep domain and optional selectors in the query string so support teams can reopen the same audit without retyping.
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DKIM selector workflow in one run
DKIM selector workflow in one run. Email Auth Checker runs SPF at the domain apex, DMARC at _dmarc.<domain>, and DKIM for each selector you provide in one coordinated report. Shareable result URLs keep domain and optional selectors in the query string so support teams can reopen the same audit without retyping.
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DMARC readiness before enforcement
DMARC readiness before enforcement. Email Auth Checker runs SPF at the domain apex, DMARC at _dmarc.<domain>, and DKIM for each selector you provide in one coordinated report. Shareable result URLs keep domain and optional selectors in the query string so support teams can reopen the same audit without retyping.
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Reading the email auth summary score
Reading the email auth summary score. Email Auth Checker runs SPF at the domain apex, DMARC at _dmarc.<domain>, and DKIM for each selector you provide in one coordinated report. Shareable result URLs keep domain and optional selectors in the query string so support teams can reopen the same audit without retyping.
Read article →shareable email auth checker results, email auth checker, spf dkim dmarc
Shareable email auth checker result pages
Shareable email auth checker result pages. Email Auth Checker runs SPF at the domain apex, DMARC at _dmarc.<domain>, and DKIM for each selector you provide in one coordinated report. Shareable result URLs keep domain and optional selectors in the query string so support teams can reopen the same audit without retyping.
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