[ Free tool · Reputation & Security ]
Blacklist & DNSSEC Checker
Check your mail server IPs on spam blocklists and see DNSSEC status.
[ About this tool ]
This blacklist and DNSSEC checker tests your mail server IPs against public DNS blocklists and verifies whether your domain is DNSSEC-signed.
How to read the results
- ›A listing can send mail to spam or cause rejections.
- ›Request delisting after fixing the cause.
- ›Some lists cannot be queried from public resolvers and show n/a.
Frequently asked questions
How do I check if my domain is blacklisted?
Enter your domain; the tool resolves your mail server IPs and queries common blocklists.
Learn more in our guide: Email Deliverability: How to Reach the Inbox, Not Spam
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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