Every lookup, one box
SuperCheck routes a single input to the right diagnostic: the way mxtoolbox's SuperTool does, but private, dark, ad-free and faster. Prefix your query with a command to force a specific check, or paste a bare domain to run the full graded Mail Health Report. DNS record types (a, aaaa, mx, txt, ns, cname, soa, caa, srv), email authentication (spf, dmarc, dkim), reputation (blacklist), reverse DNS (ptr), whois, dnssec and ssl are all one keystroke away. Every check runs live against public data for the one target you name; nothing is uploaded or stored, and your recent lookups stay on this device only.
Frequently asked questions
What commands can I use?
a aaaa mx txt ns cname soa caa srv dns for records, spf dmarc dkim for email auth, blacklist (or dnsbl) for reputation, ptr for reverse DNS, plus whois, dnssec and ssl. No prefix runs the full Mail Health Report on a domain, or a blacklist check on an IP.
How is this different from mxtoolbox SuperTool?
Same public data, but no ads, no login, dark and fast, and every result is a private, shareable permalink. For a single graded verdict across all of it, use the Mail Health Report.
Is anything stored?
No. Lookups run live and results live only in your browser. Your recent-lookup history is kept in this browser's local storage and never leaves the device.