Free Email Verifier
Check if an email address is real before you send. Detects invalid mailboxes, catch-all domains, and SEG-protected addresses.
PressEnter ↵to verify
Paste an address to get a verdict
We check the format, look up MX records, and probe the mailbox without sending an email. Results come back as deliverable, risky, undeliverable, or unknown.
How it works
3 quick steps from input to answer. No account, no install.
Back to the tool- 01
Enter an email address
Any address. Yours, a prospect's, or a list you're about to import.
- 02
We run 3-layer verification
Format check, MX record lookup, and mailbox-level deliverability probe.
- 03
Get a clear verdict
Deliverable, undeliverable, risky, or unknown, with the reason why.
Why this matters
Sending to invalid email addresses causes bounces. High bounce rates damage your sender reputation and can get you blacklisted. Validating emails before sending protects your deliverability and saves you from wasting outreach on dead addresses.
SendboxUnlimited email validation on every plan
Powered by Enrich.so out of the box, or bring your own API key. Sendbox supports 10+ major enrichment and validation providers. Validate your entire list on import.
Bulk validation
Validate entire CSV lists on import, thousands at a time
10+ providers
Enrich.so built-in, or bring your own API keys for any provider
Auto-clean on import
Invalid emails are flagged and skipped before your campaign starts
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Format and MX record checks are highly accurate. Mailbox-level verification can detect most invalid addresses but some servers do not reveal whether a specific mailbox exists (catch-all domains). Overall accuracy is typically 95%+.
Ready to land in primary?
Get your own isolated Sendbox setup running and start sending inside 15 minutes.
Every plan includes a dedicated IP. Cancel whenever you want.
