Protegy security tool · updated 2026-08-20
Email domain security checker
Inspect live MX, SPF, DMARC, MTA-STS, and DNSSEC signals through Google Public DNS.
Transparent inputs · no analytics event contains your value
The public domain name will be queried through Google Public DNS. No mailbox address is sent.
How to use this result
Missing records are prompts for an administrator, not proof of compromise. MX shows mail routing; SPF and DMARC help control sender impersonation; MTA-STS can protect mail transport; DNSSEC authenticates DNS answers.
Live DNS source and limits
Queries use the Google Public DNS JSON API with DNSSEC validation enabled. Results describe public DNS at query time; they do not test mailbox configuration, delivery, TLS negotiation, or whether a policy is enforced correctly by every receiver.
Google Public DNS JSON API ↗