Free tool · nothing stored

Check your domain.

Type a domain. We ask DNS, in real time, for the mail records a receiver would see, and we say what is solid, what is unfinished, and what to fix.

• 01 / MX

  Where mail for the domain is supposed to land. No MX usually means senders guess, and they guess the website.

• 02 / SPF

  The TXT record that lists who may send as you. Two of them, or a record that ends in +all, is a problem.

• 03 / DMARC

  The policy at _dmarc. Monitor mode (p=none) is a start. It does not stop a spoof.

• 04 / DKIM

  Public keys at google, selector1, selector2, default, and k1. A key with a different name will not show up.