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Type a domain. We read its live DNS.

We resolve MX, SPF, DKIM and DMARC as they are right now, name the host that holds your mail, and print what a per-person bill costs you.

Reading DNS takes up to 8 seconds. Nothing is stored against your name and no address is asked for.

Try a domain you already own, or a client domain you babysit. The result has its own URL, so you can send it to the person who has to agree to the change.