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SPF, DKIM and DMARC checker

We read published DNS records. We do not send mail or guess mailbox passwords.

Want this checked in your environment?

The tool stays free. The form is for implementation scope — I usually reply within 1 business day.

I usually reply within 1 business day. The inquiry is stored on the server; you get a confirmation from hello@tomek.st. Sending does not commit you to a contract.