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Supertool

One box for every domain check

Type a domain for a full email authentication report, or scope a single check with dmarc:, spf:, dkim:, mx:, mta-sts:, tls-rpt:, bimi:, blacklist:, plus dns:, ptr:, dnssec:, and whois: for DNS records, reverse DNS, DNSSEC, and registration data.

Live lookups, no account required. Get alerted when a domain's records change.

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What Supertool does

Supertool is one box for every domain check on DMARCdrift. Type a bare domain for a full email authentication report (DMARC, SPF, DKIM, MTA-STS, TLS-RPT, BIMI, MX, and PTR with an A to F grade), or lead with a prefix to scope a single check. It is the fastest way to look something up when you already know what you want, without hunting through the tools directory first.

How the query grammar works

A bare domain like example.com runs the full authentication report. dmarc:, spf:, bimi:, blacklist:, dns:, ptr:, dnssec:, and whois: route to the dedicated tools with their full output (parsed records, the SPF include tree, DNSBL listings, DNS records, reverse DNS, DNSSEC chain, registration data, and more). mx:, dkim:, mta-sts:, and tls-rpt: pull a single signal from the authentication scan. bl: is shorthand for blacklist:. Prefixes are case-insensitive, and a pasted URL is treated as a bare-domain lookup.

Frequently asked questions

What can I type into the box?
A bare domain runs the full email authentication report. Lead with a prefix and a colon to scope a single check: dmarc:, spf:, dkim:, mx:, mta-sts:, tls-rpt:, bimi:, blacklist: (also bl:), dns:, ptr:, dnssec:, or whois:.
Is this an mxtoolbox alternative?
Yes. If you are used to typing dmarc:example.com into a single box, Supertool gives you the same muscle memory for DMARC, SPF, DKIM, BIMI, blacklist, and a full authentication grade. It is free and needs no signup.
Why did my blacklist check say no MX records?
The blacklist check looks up the IP addresses of a domain's mail servers and tests those against public DNSBLs. A domain with no MX records has no mail servers to check, so there is nothing to look up. That is expected for parked or web-only domains.
What is the difference between a bare domain and a prefix?
A bare domain returns every signal at once with an overall grade. A prefix narrows the answer to one check and, for dmarc:, spf:, bimi:, blacklist:, dns:, ptr:, dnssec:, and whois:, links straight to that tool's full breakdown.

Checking domains often?

DMARCdrift watches your DMARC, SPF, and DNS records continuously and alerts you the moment one changes, before it affects deliverability.

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Monitor every domain's authentication grade continuously. Free for one domain.

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