How to use Best Email Verifier
- Start by entering an email address or domain in Best Email Verifier.
- Run it, and Best Email Verifier issues the DNS lookups directly from your browser.
- Review the result, which Best Email Verifier fetches live from a public DNS resolver.
About this tool
There is no server of ours behind Best Email Verifier. Best Email Verifier 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
How do I use Best Email Verifier?
Best Email Verifier validates the address format and checks the domain's MX, SPF and DMARC records via DNS from your browser.
Does Best Email Verifier cost anything?
No — Best Email Verifier is completely free, with no sign-up and no hidden limits.
Where does Best Email Verifier run its checks?
Best 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 Best Email Verifier confirm a mailbox really exists?
Best 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.