The benchNo account · no email gate · live DNS
15 tools. $0.No signup.
Every tool here runs the same checks the paid monitor runs — one engine, so the free answer and the monitored answer never disagree.
The bench
01SPF LookupResolve and validate an SPF record, including the 10-lookup limit.→02DKIM LookupFind and inspect DKIM public keys on any selector.→03DMARC LookupRead a DMARC policy and judge how much it actually protects.→04MX LookupList mail exchangers with priorities and resolved addresses.→05BIMI LookupCheck a BIMI record and whether its logo and VMC qualify.→06PTR LookupReverse-resolve a sending IP and check forward-confirmed rDNS.→07MTA-STS CheckerFetch the policy file and verify enforcement mode and MX match.→08Mail Provider LookupIdentify who actually handles mail for a domain.→09Blacklist CheckerQuery 34 DNSBLs for a domain or IP in one pass.→10DMARC GeneratorBuild a DMARC record with a policy you can defend.→11SPF GeneratorCompose an SPF record that stays under the lookup limit.→12Subject Line TesterScore a subject line for spam triggers and clarity.→13Email Headers AnalyzerTrace a message hop by hop and read its auth results.→14WHOIS LookupRegistration, registrar and nameservers via WHOIS/RDAP.→15Domain Health CheckThe full scan — every check the paid monitor runs, once.→
Every tool runs live against public DNS — 41 checks in the full scanSame engine as the monitor
Or run all 41 at once.
One domain, one pass, every check — with each finding diagnosed and paired with its exact fix.