[ Free tool · DNS & Mail Servers ]
CAA Record Checker
See which certificate authorities may issue TLS certs for you.
[ About this tool ]
This CAA checker finds the Certification Authority Authorization policy for a domain, walking up to parent domains as CAs do, and lists which authorities may issue certificates.
How to read the results
- ›No CAA means any CA may issue certificates for you.
- ›issue controls normal certificates, issuewild controls wildcards.
- ›An iodef address lets CAs report blocked requests.
Frequently asked questions
Why does CAA matter for email security?
Mail servers, MTA-STS policy hosts and webmail all use TLS certificates. CAA limits who can issue them, reducing mis-issuance risk.
Learn more in our guide: Email Security: Stop Spoofing, Phishing and BEC
Enterprise provenance
Why top financial institutions and governments retired their email security dashboards.
Traditional email authentication platforms sell you a dashboard and ask your engineers to do the labour. In high-stakes environments, manual oversight means delayed enforcement, configuration drift and unmonitored shadow domains.
EmailAuth is the agentic email provenance platform. Our agents enforce p=reject, keep third-party senders aligned and move your domains to full RFC 9989 compliance, the new DMARC standard,, with human-in-the-loop auditability.
SaaS · Dedicated tenancy · Air-gapped on-prem · BYOK encryption
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