How to use Free Online Email Validator
- Enter an email address or domain into Free Online Email Validator.
- Press the button and Free Online Email Validator sends the DNS lookups from your browser.
- See the response from a public DNS resolver; Free Online Email Validator only displays what comes back.
About this tool
There is no server of ours behind Free Online Email Validator. Free Online Email Validator validates an address syntax locally, then checks the domain MX, SPF and DMARC records over DNS-over-HTTPS.
The MX, SPF and DMARC lookups are real DNS-over-HTTPS queries, not guesses. The MX, SPF and DMARC checks are DNS queries sent from your browser to a public resolver; this site has no backend and never sees them, and a connection is required.
Frequently asked questions
What is Free Online Email Validator for?
Free Online Email Validator validates the address format and checks the domain's MX, SPF and DMARC records via DNS from your browser.
Is Free Online Email Validator free to use?
Yes — Free Online Email Validator is completely free, with no usage limits.
Where does Free Online Email Validator run its checks?
Free Online Email Validator runs DNS lookups (MX, SPF, DMARC) from your browser against a public DNS-over-HTTPS resolver. This site has no backend and never sees them; the public resolver does.
Can Free Online Email Validator confirm a mailbox really exists?
Free Online Email Validator checks address syntax and the domain's MX, SPF and DMARC via DNS-over-HTTPS; proving a live mailbox needs to send mail, which a browser cannot do.