How to use Email Verifier
- Give Email Verifier an email address or domain to work with.
- Trigger Email Verifier and it sends the DNS lookups from your browser, not from this site.
- See the response from a public DNS resolver; Email Verifier only displays what comes back.
About this tool
Email Verifier runs in your browser with no backend of its own. Email Verifier 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 Email Verifier 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 does Email Verifier do?
Email Verifier validates the address format and checks the domain's MX, SPF and DMARC records via DNS from your browser.
Is Email Verifier free to use?
Yes — Email Verifier is completely free, with no usage limits.
Where does Email Verifier run its checks?
Email Verifier 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 Email Verifier confirm a mailbox really exists?
Email Verifier 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.