SuperTool
Queries go straight to the domain's authoritative nameservers, so changes show up instantly.
Email HealthScore a domain 0–100: MX, SPF, DKIM, DMARC, MTA-STS, BIMI, rDNS, blacklists, reachability.
Blacklist CheckCheck an IP or host against the major DNS blacklists (RBLs).
SMTP DiagnosticsConnect from outside: banner, rDNS, STARTTLS, certificate, open relay, timings.
SPF / DMARC / DKIMLook up and validate the authentication records for a domain.
DNS CheckDelegation, nameserver health, SOA values, glue and dispersion — parent vs child.
DNS PropagationCompare answers from Cloudflare, Google, Quad9, OpenDNS and the authoritative servers.
WHOISRegistrar, registrant, dates, status and nameservers for any domain or IP.
Find a DomainCheck availability across .com.au, .au, .com and more — with our prices.
Google / Microsoft ComplianceWill your mail be accepted? Checks the 2024 Google & Yahoo and 2025 Outlook sender requirements, with fixes.
SPF GeneratorTick your providers, get a correct SPF record with the DNS-lookup count checked live.
DMARC GeneratorBuild a DMARC record step by step, from monitoring to full enforcement.
MTA-STSValidate the DNS record and policy file, and confirm every MX host is covered.
TLS-RPTCheck your TLS reporting record and that reports can actually be delivered.
BIMICheck the record, validate the SVG logo against the Tiny PS profile and the VMC, with a preview.
Header AnalyzerPaste an email's headers to see the hop-by-hop route, delays and SPF/DKIM/DMARC results.
DMARC Report UploadDrop the XML, zip or gz files a receiver emailed you and read them as a table: every sender, pass/fail, who is spoofing you.
DMARC ReportsWho is sending as your domain, what passes and fails, unknown senders — with weekly summary emails.
Monitoring & AlertsGet emailed when DNS changes, a mail server goes down, a cert nears expiry or an IP gets blacklisted.