Is this tool free and do I need an account?

It is free to use without an account. Domain checks have request limits to protect public services. Results can be downloaded from this page.

Where is my input processed?

Checks run on our server and contact public DNS, registry, website or Ahrefs services as needed. Results can be cached; inputs are not added to your URL or account. Do not submit private addresses or secrets.

What should I check before using the result?

This checks DNS configuration, not inbox placement or a message signature. SPF include expansion and its recursive DNS lookup limit are not evaluated. DMARC alignment is not tested. Without a selector, DKIM is not checked, never labelled missing.

SPF, DKIM, DMARC & MX checker

Inspect email DNS records in one report, with published policies, a DKIM selector lookup and MX priorities.

A report you can act on

Enter your domains to see measured values, sources and check times. Missing records, unsupported services and temporary failures are shown separately.

From input to output

How to use it

DKIM specification ↗

Enter the domain used for email.
For DKIM, enter the selector supplied by your mail provider or the s= value from a signed email.
Review published SPF, DMARC and MX records, plus DKIM if supplied. Resolver failures remain visible.

Good to know

Is this tool free and do I need an account?: It is free to use without an account. Domain checks have request limits to protect public services. Results can be downloaded from this page.
Where is my input processed?: Checks run on our server and contact public DNS, registry, website or Ahrefs services as needed. Results can be cached; inputs are not added to your URL or account. Do not submit private addresses or secrets.
What should I check before using the result?: This checks DNS configuration, not inbox placement or a message signature. SPF include expansion and its recursive DNS lookup limit are not evaluated. DMARC alignment is not tested. Without a selector, DKIM is not checked, never labelled missing.

SPF, DKIM, DMARC & MX checker

Run a domain check

A report you can act on

How to use it

Good to know

SPF, DKIM, DMARC & MX checker

Run a domain check

A report you can act on

How to use it

Good to know