SPF, DKIM & DMARC Checker

Look up a domain's MX, SPF, DMARC and DKIM records and spot deliverability problems.

Live check made by our server to the public address you enter (rate-limited).

Why these records matter

SPF: Lists the servers allowed to send email for your domain. One record only, under 10 DNS lookups.
DKIM: A cryptographic signature on each message. The key lives at selector._domainkey.yourdomain; your email provider tells you the selector.
DMARC: Tells receivers what to do when SPF/DKIM fail and where to send reports. Start with p=none, then tighten.

Results reflect DNS as seen by our server right now; recent changes can take time to propagate.

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