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Free security tools
SPF, DKIM, DMARC, DNS and SSL checkers
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Free tools

Free cyber security tools.

A set of free checks for Australian businesses. Test your email authentication, look up DNS records, inspect an SSL certificate, or assess your Essential Eight maturity. No signup, instant results.

Email authentication

Email security checker

Check SPF, DKIM and DMARC together and get a scored, plain-English result.

DMARC checker

See your DMARC policy (none, quarantine or reject) and what to fix.

SPF checker

Check your SPF record, the ten-lookup limit and the hard-fail setting.

DKIM checker

Confirm DKIM signing is on, including the Microsoft 365 selectors.

Domain and web

DNS checker

Look up a domain's A, MX, NS, TXT, CNAME, SOA and CAA records.

SSL checker

Inspect a certificate: issuer, expiry, protocol and whether it is trusted.

Compliance

Essential Eight self-assessment

Assess your maturity across all eight controls and see where you stand.

Found a problem the tools flagged?

The checks tell you what is wrong. If you would rather have it fixed and tested properly, we handle email authentication, DNS, certificates and wider security as part of a Microsoft 365 or infrastructure engagement.