How to use Free Email Validation Checker
- Give Free Email Validation Checker an email address or domain to work with.
- Press the button and Free Email Validation Checker sends the DNS lookups from your browser.
- See the response from a public DNS resolver; Free Email Validation Checker only displays what comes back.
About this tool
There is no server of ours behind Free Email Validation Checker. Free Email Validation Checker validates an address syntax locally, then checks the domain MX, SPF and DMARC records over DNS-over-HTTPS.
Proving a specific mailbox exists requires sending mail, which a browser cannot do, so Free Email Validation Checker focuses on the DNS signals that genuinely can be checked. 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 Email Validation Checker for?
Free Email Validation Checker validates the address format and checks the domain's MX, SPF and DMARC records via DNS from your browser.
Do I need an account for Free Email Validation Checker?
No — Free Email Validation Checker needs no account, sign-up or installation.
Where does Free Email Validation Checker run its checks?
Free Email Validation Checker 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 Email Validation Checker confirm a mailbox really exists?
Free Email Validation Checker 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.