Free tool

Is your email DNS right?

Check the SPF, DKIM, DMARC, and MX records for any domain in seconds. Plain-language results, exact records shown, and what to fix. Free, no signup.

SPF

A TXT record listing the servers allowed to send email as your domain. Receivers check it on every message; a missing or broken SPF record hurts deliverability.

DKIM

A cryptographic signature your email sending service adds to each message, verified against a public key in your DNS. It proves the email was not altered in transit.

DMARC

The policy that tells receivers what to do when SPF and DKIM fail, and where to send reports. Gmail and Yahoo require it for bulk senders.

MX

Where mail sent TO your domain is delivered. Needed for replies, bounce handling, and the DMARC reports other providers send you.

DNS sorted? Send something.

GoodPostal runs campaigns through the email sending service this DNS belongs to: $19 a month plus 5 cents per 1,000 emails sent, unlimited contacts.

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