Email DNS Checker
Server requestCheck the DNS records that email depends on — MX, SPF, DMARC and optionally DKIM — and get a clear summary of what’s configured.
How to read the results
The summary lists each check with a pass/attention indicator. MX shows the mail servers. SPF and DMARC are parsed and explained on their own. DKIM is only checked if you provide the selector your provider assigned.
What this doesn’t do
This tool does not send test emails or evaluate reputation. It reports DNS configuration only.
Data source: Public DNS-over-HTTPS resolver. Record contents are not sent to analytics. Learn about our data sources →
Frequently asked questions
Does a passing check mean my email will always deliver?
No. DNS records are necessary but not sufficient. Deliverability also depends on IP reputation, content, and receiver policies. These checks only inspect DNS configuration.
Can you detect my DKIM selector automatically?
No. DKIM selectors are chosen by your mail provider and are not discoverable from DNS alone. Enter the selector your provider gave you (e.g. "google", "s1", "selector1").
What is a Null MX?
An MX record of "0 ." explicitly declares that a domain accepts no email. It is valid and intentional for non-mail domains.