DNS Checker — Free & Instant

About this tool. A quick health pass over the fundamentals of your DNS zone: enough nameservers, a valid SOA, no CNAME at the apex, and the records a working website and mailbox depend on. Green means the plumbing is sound.

Ten signals decide whether your mail arrives. You just checked one.

A healthy zone is the foundation, not the finish. Inbox placement is decided by authentication and reputation on top of it.

SPF, DKIM, DMARC, MX and blocklist status, graded A to F in one pass
Every problem written out in plain English, with the record to publish
Saved under Reports, so you can re-run it and see what changed
One domain watched against the blocklists daily

Run the full checkup free

No card, and nothing to cancel.

How to read your DNS health check

This runs a quick health pass across the whole zone: nameservers, MX, SOA and common misconfigurations, summarized in plain English.
Green means healthy. Warnings point to things worth fixing even if mail still flows today.

Common problems and how to fix them

A warning about missing email authentication

Add SPF, DKIM and DMARC. Use the dedicated checkers here for the exact records to publish.

Nameserver mismatch

Align the nameservers at your registrar with the ones actually serving the zone.

MX Lookup A Record AAAA Record CNAME Lookup Full email checkup

Common questions.

What does a DNS health check look at?

Nameserver consistency, mail routing (MX), zone authority (SOA), and common issues that quietly cause problems.

Is a passing DNS check enough for email?

It is the foundation, but inbox placement also depends on SPF, DKIM, DMARC and your sending reputation.