Email authentication
0.86.74.109 SPF validation
Cached SPF record analysis for this domain.
Something went wrong
invalid domain
Tool switcher
Continue with another check
Same target (0.86.74.109) — open the next tool without retyping.
- Email Auth CheckerSame targetRun SPF, DMARC, and DKIM checks in one audit0.86.74.109Open
- DMARC AnalyzerSame targetDMARC policy, alignment and reporting checks0.86.74.109Open
- DKIM ValidatorSame targetDKIM selector lookup and record validation0.86.74.109Open
- DNS CheckerSame targetAll major record types in one pass0.86.74.109Open
- DIGSame targetOne record type, resolver-style answer0.86.74.109Open
- Domain IP LookupSame targetA and AAAA IP addresses for a domain0.86.74.109Open
- Domain Age CheckerSame targetCreation date, age, registrar and expiry0.86.74.109Open
- WHOISSame targetRegistrar, expiry and domain status0.86.74.109Open
- HTTP Header CheckerSame targetResponse headers, redirects and caching0.86.74.109Open
- HTTP/2 TesterSame targetHTTP/2 support, ALPN and TLS negotiation0.86.74.109Open
- SSL Certificate CheckerSame targetCertificate chain, SAN and TLS version0.86.74.109Open
- Blacklist CheckerSame targetDNSBL reputation for IP and domain0.86.74.109Open
- Punycode ConverterUnicode ↔ Punycode for IDN domainsOpen
- URL SplitterSame targetBreak a URL into parts and query paramshttps://0.86.74.109/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 CheckerSame targetCard brand, bank and country from BIN/IIN08674109Open
- IP CalculatorSame targetSubnet math for IPv4 and IPv6 CIDR0.86.74.109Open
- Browser Update CheckerBrowser version, update status and Client HintsOpen
Guides
Related articles
Practical guides for common SPF Validator tasks — DNS records, troubleshooting steps, and links to our free tools.
spf txt record basics, spf validator, v=spf1
SPF TXT record basics at the domain apex
SPF TXT record basics at the domain apex. SPF authorizes mail senders through a single v=spf1 TXT record published at the domain apex, not at _dmarc or DKIM selectors. DN01 returns parsed mechanisms, lookup estimates, warnings, and a shareable result URL for the same domain after DNS changes.
Read article →include mechanisms third party senders, spf validator, v=spf1
Include mechanisms and third-party senders
Include mechanisms and third-party senders. SPF authorizes mail senders through a single v=spf1 TXT record published at the domain apex, not at _dmarc or DKIM selectors. DN01 returns parsed mechanisms, lookup estimates, warnings, and a shareable result URL for the same domain after DNS changes.
Read article →terminal all qualifiers, spf validator, v=spf1
Terminal all qualifiers: pass, fail, softfail, neutral
Terminal all qualifiers: pass, fail, softfail, neutral. SPF authorizes mail senders through a single v=spf1 TXT record published at the domain apex, not at _dmarc or DKIM selectors. DN01 returns parsed mechanisms, lookup estimates, warnings, and a shareable result URL for the same domain after DNS changes.
Read article →spf dns lookup limit, spf validator, v=spf1
SPF DNS lookup limit and flattening
SPF DNS lookup limit and flattening. SPF authorizes mail senders through a single v=spf1 TXT record published at the domain apex, not at _dmarc or DKIM selectors. DN01 returns parsed mechanisms, lookup estimates, warnings, and a shareable result URL for the same domain after DNS changes.
Read article →spf dmarc alignment, spf validator, v=spf1
SPF alignment with DMARC enforcement
SPF alignment with DMARC enforcement. SPF authorizes mail senders through a single v=spf1 TXT record published at the domain apex, not at _dmarc or DKIM selectors. DN01 returns parsed mechanisms, lookup estimates, warnings, and a shareable result URL for the same domain after DNS changes.
Read article →shareable spf validator results, spf validator, v=spf1
Shareable SPF validator result pages
Shareable SPF validator result pages. SPF authorizes mail senders through a single v=spf1 TXT record published at the domain apex, not at _dmarc or DKIM selectors. DN01 returns parsed mechanisms, lookup estimates, warnings, and a shareable result URL for the same domain after DNS changes.
Read article →