Email Validator
Check an email's format locally and verify its domain can receive mail with a live MX lookup, plus typo detection — free, instant, no signup.
Network notice: only the domain (the part after the @) is sent to Google's public DNS (dns.google) over HTTPS to check its mail records. The full address and the part before the @ never leave your browser.
Enter an email address and press Validate.
This tool runs entirely in your browser. Your data never leaves your device — it is not uploaded to any server.
How to use
- 1Type or paste the address into the field and press Validate.
- 2Read the Syntax row: it catches malformed local parts, doubled dots and invalid domains without any network call.
- 3Check the Mail servers row for proof that the domain can receive email — a few domains without MX still accept mail via an A record, and the tool notes that too.
- 4If a typo is suggested, correct the domain and validate again.
Email Validator
A syntactically valid address can still bounce if its domain has no mail servers. This validator first checks the format entirely in your browser — length, characters, dot placement and domain labels — then queries live DNS over HTTPS to see whether the domain actually publishes MX (mail exchange) records.
It also compares the domain against a list of the most common providers and flags likely typos like gmial.com. Only the domain part is sent over the network; the part before the @ never leaves your browser.
Frequently asked questions
Does this check whether the mailbox itself exists?
No. Mail servers generally don't reveal whether a specific mailbox is real (and probing them would be intrusive). This tool verifies the format and that the domain is configured to receive mail, which is what most verification flows actually need. Full or abandoned mailboxes can still bounce.
What exactly is sent over the network?
Only the domain — the part after the @ — in a DNS query to Google's public resolver (dns.google) over HTTPS. The full address and everything before the @ stay in your browser.
Why did a valid address fail the MX check?
A few domains publish no MX records and rely on their A record (implicit routing); the tool tells you when that's the case. Others publish a null MX, explicitly saying “no mail here”. Corporate or brand-new domains may also be missing from public resolver caches for a short while — try again in a minute.
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Embed this tool
Put this tool on your own site with one line — it runs entirely in the visitor's browser.
<iframe src="https://zoyku.com/en/tools/email-validator?embed=1" width="100%" height="640" style="border:0;border-radius:16px" title="Zoyku — email-validator" loading="lazy"></iframe>