How to use ZeroBounce Email Verifier
- Start by entering an email address or domain in ZeroBounce Email Verifier.
- Run it, and ZeroBounce Email Verifier issues the DNS lookups directly from your browser.
- Read the response ZeroBounce Email Verifier shows below — it comes from a public DNS resolver, not from this site.
About this tool
There is no server of ours behind ZeroBounce Email Verifier. ZeroBounce Email Verifier inspects the DNS-level deliverability signals for a domain directly from your browser.
Proving a specific mailbox exists requires sending mail, which a browser cannot do, so ZeroBounce 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 ZeroBounce Email Verifier do?
ZeroBounce Email Verifier validates the address format and checks the domain's MX, SPF and DMARC records via DNS from your browser.
Does ZeroBounce Email Verifier cost anything?
No — ZeroBounce Email Verifier is completely free, with no sign-up and no hidden limits.
Where does ZeroBounce Email Verifier run its checks?
ZeroBounce 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 ZeroBounce Email Verifier confirm a mailbox really exists?
ZeroBounce 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.