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ReachStream's free email verifier checks whether an email address is valid before you hit send — no credit card required.
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Every free email verifier check runs a 7-layer scan in under two seconds — here's what it tests before returning a result.
RFC-standard syntax validation confirms the address is formatted correctly before any deeper check runs.
We confirm the domain exists and is actually configured to receive mail.
A live SMTP handshake checks whether the specific mailbox exists — without sending a message.
Catch-all email verification, role-based email detection, and disposable email detection each get their own risk flag.
This free online email verifier does more than a yes/no check if an email address is valid — as a full email address verifier, every free email address validation returns valid, invalid, risky, and catch-all email results.
The mailbox exists and can safely receive mail — send with confidence.
The address doesn't exist, is misspelled, or the domain can't receive mail.
Likely deliverable but flagged — often a role-based or disposable address.
The domain accepts mail sent to any address, so a real mailbox can't be confirmed either way.
A free email address validator does more than avoid bounces — it protects the sending reputation your whole team depends on.
Using this email address verifier before every send clears out invalid and risky addresses so fewer messages ever bounce — a simple habit that helps reduce email bounce risk across every list you send to.
Email deliverability depends on your domain's reputation — email list cleaning with a trusted email verifier keeps it high.
Every email you send costs money — verify an email address first and only pay to reach inboxes that actually exist.
Upload a CSV or paste a list to check email addresses for free at scale — up to 25,000 per batch, with a detailed result for every row from the same free email address validator behind the single-check tool above.
Upload a list →Drop our free email verifier straight into your signup form, CRM, or product with a REST API that responds in under 200ms.
Check a single address in seconds with this free email verification tool, or verify your whole list. 100 free credits, no credit card required.