Quick deliverability check

Is your SPF / DKIM / DMARC posture lock-tight — or open to spoofers?

Paste any sending domain and we'll resolve the SPF record at the root, the DKIM key at <selector>._domainkey.<domain> and the DMARC policy at _dmarc.<domain>, then parse each one against the relevant RFC. Each protocol is reduced to a pass / warn / fail verdict, with a one-sentence plain-language explanation when something is off.

Check the SPF / DKIM / DMARC posture for a domain
Paste a sending domain and we'll resolve the SPF record at the root, the DKIM key at <selector>._domainkey.<domain> and the DMARC policy at _dmarc.<domain>. Each protocol is parsed against the relevant RFC and reduced to a verdict plus a one-sentence plain-language explanation when something's off.
Optional DKIM selectorDefaults to "default" — override for custom ESPs

DKIM selectors are the subdomain labels that distinguish one key from another (e.g. k1._domainkey.example.com). Leave blank to probe default.

Continuous DNS posture monitoring?
One email and we'll let you know when ReputaPilot opens up — continuous posture monitoring across SPF, DKIM and DMARC, plus blocklists and inbox placement, with an email the moment a record flips or a new listing appears.

Drop your email above — we'll only ping you about the DNS posture monitor. No newsletters, no upsells.

Have a specific question? Email us

FAQ

DNS health check — frequently asked questions

Pair this checker with the guide

Want the bigger picture on sender reputation?

DNS health is the entry-ticket check — the part of sender reputation that has to be clean before Gmail Postmaster Tools or Microsoft SNDS even consider the rest. The full reputation guide explains how the same SPF/DKIM/DMARC floor composes with engagement signals, complaint rate, and blocklist status to produce the real inbox placement a sender actually sees.

Read the sender reputation guide →