dmarcexpert

Free tool

Free DMARC checker

Enter a domain and we will look up its live DNS records and tell you, in plain English, whether it is protected against impersonation and what to do next.

We look up the domain's public DNS records. Nothing is stored against you.

What this checks

  • Whether the domain publishes a DMARC record, and what its policy is.
  • Whether an SPF record exists, and how many DNS lookups it uses.
  • Any warnings the record itself raises, in plain language.

We do not guess DKIM selectors, because there is no reliable way to discover one for a domain you do not control. To understand what the results mean, start with what is DMARC. To act on them, read the path to p=reject.