About DNS Doctor
What this service is, how it generates the records it recommends, and how to reach the company behind it.
A scanner first, a monitor after
DNS Doctor scans, fixes and verifies a domain's DNS: email authentication (SPF, DKIM, DMARC), MX, DNS hygiene, blacklist status, and domain and SSL certificate expiry, with free standalone tools for global propagation and record lookups alongside. The scan is free and requires no signup.
The paid Monitor plan watches verified domains continuously: scheduled re-scans, reading the DMARC reports mailbox providers send, the next stricter policy once those reports show it is safe, a daily lookalike-domain watch, and email alerts when something changes. A one-time package takes a single domain to reject (receivers refuse mail forged in its name) instead. Plans and limits are listed on the pricing page.
The engine writes records. The AI never does.
Every record DNS Doctor recommends is generated and validated by a deterministic engine that follows the published RFC grammar, including the SPF limit of 10 DNS lookups. The AI layer writes only the plain-English explanation of each finding.
This split exists because SPF and DMARC errors fail silently: a wrong record still parses as a valid one, and mail quietly stops authenticating. A language model that guesses a record can be confidently wrong in exactly that invisible way, so it is never allowed to write one here.
Nothing is applied automatically. Every record is handed to you to review and publish at your DNS provider. The full accounting behind each verdict is on the methodology page.
Independent and subscription-funded
DNS Doctor is an independent software company. It launched in 2026 and is funded by its subscriptions, not by advertising or by reselling data.
The agent and developer integrations are open source: plugins for Claude Code (with its thin MCP client), Codex and OpenClaw, a Gemini CLI extension, LangChain tools, an n8n node, a command-line tool and a GitHub Action, all published on GitHub under the dnsdoctor organization, which is domain-verified against dnsdoctor.dev. Customer reviews are on Trustpilot.
Support, security reports, and everything else: hello@dnsdoctor.dev.
Scan your domain
Check SPF, DMARC, DKIM, MX, DNS health, blacklists and domain & SSL expiry in one free scan, with the exact record to paste for each problem it finds.