DNS Doctor - Email & DMARC

Find out why email from your domain lands in spam, check whether a DNS change has reached resolvers in six locations, and keep watch on your domain's email, DNS and website. Ask in plain words and get a clear answer, with the exact record to publish when a fix needs one.

With DNS Doctor you can:

• Check email authentication: diagnose SPF, DKIM and DMARC, mail routing (MX), blocklists, domain and SSL certificate expiry, and which Gmail, Yahoo, Outlook and Apple sender requirements your DNS meets.
• Check a DNS change: read A, AAAA, CNAME, MX and TXT records from the domain's own nameservers with a plain done, wait or edit answer, and see whether the change has reached resolvers in six locations on four continents.
• Test a real email: send one message to a single-use address and see how it authenticated, with a score out of 10, a per-provider estimate of acceptance and, when available, of inbox placement.
• Look up a domain: registrar, expiry, nameservers and locks, reverse DNS for a mail server, SPF lookup count and the third-party includes your SPF trusts.
• Check whether your domain meets each mailbox provider's requirements for showing its logo in the inbox (BIMI), and which look-alike names close to your domain resolve, stated as facts and never labelled malicious.
• Move DMARC to enforcement safely: DMARC records are generated and validated by a deterministic engine that follows the RFCs. The AI writes the explanation, never the record.
• Choose a domain name: check up to 20 candidate names against their registries in one go. For a name with no registration, the result card can show the lowest standard 3-year total among the registrars we track for that ending, with a link to compare them. Nothing is sold and there are no buy links.

Monitor the domains you verify by connecting a DNS Doctor account:

• Website uptime checked from five locations on four continents (US West, US East, Brazil, South Africa, Germany), with an email when the site goes down.
• DMARC aggregate reports read for you, alerts on new senders, record changes, expiry, blacklisting and registrar or nameserver changes.
• When the report evidence says it is safe to move DMARC from none to quarantine and then to reject, and what is still blocking it.
• From ChatGPT: list your domains with their next step, add a domain, check its ownership record, read the alerts, and review watched look-alike names with their threat scores.

SPF is diagnosed but never rewritten, because a changed SPF record can silently cut off a real sender. ChatGPT never changes your DNS: you publish the records yourself.