Free tools / Email Verifier
Free email verifier
Paste an email address and we run the checks a mail server would run before accepting it: is the syntax legal, does the domain exist and publish MX records, is it a throwaway provider, is it a role address like info@ or sales@, and is it a free mailbox provider. The result tells you whether mail to this address has a real chance of arriving.
This is the domain-level pass. The API adds a mailbox-level SMTP handshake where the receiving server allows it, plus a risk score that combines all of the signals. Neither one sends an email to the address.
What you get back
Syntax. Whether the address is structurally legal. Catches the typos that make up most bounces on a signup form.
Domain accepts mail. Whether the domain publishes MX records. No MX means nothing will ever be delivered, no matter how good the address looks.
Disposable. Whether the domain belongs to a temporary-inbox service such as Mailinator or 10minutemail. These addresses are dead within the hour.
Role and free provider. Role accounts (info@, support@) rarely convert and often mark mail as spam. Free providers are fine for consumers but a weak signal for B2B leads.
How to use it
- Paste the address.
- Press Verify. The domain checks take a fraction of a second.
- Act on the result. Undeliverable means drop it. Disposable means treat the signup as a throwaway. Role account means route it differently or ask for a personal address.
Who uses this
Signup and checkout forms. Catching a typo while the user is still on the page beats a bounced welcome email and a lost account.
Cold email senders. A bounce rate over two or three percent gets a sending domain throttled. Verifying the list first is the cheapest deliverability fix there is.
CRM admins. Old records rot. Reverifying a database once a quarter keeps the marketing team out of the spam folder.
Same check, in your code
One API key, one credit pool, 1,000 free lookups to start. Phone, email, IP and DNS checks from a single endpoint, and you only pay for lookups that return an answer.
Start free Read the docsQuestions
Does this send an email to the address?
No. The checks are DNS and, on the API, an SMTP handshake that stops before any message is sent. The recipient never sees anything.
What does Deliverable domain mean?
The domain exists and accepts mail, and the address is not disposable. The specific mailbox has not been confirmed. The API adds mailbox confirmation where the receiving server permits it.
Why can some mailboxes not be confirmed?
Catch-all domains accept mail for any address, and some providers refuse verification probes. In those cases the answer is a domain-level result plus a risk flag.
Is a free provider address bad?
For consumer products, no. For B2B lead lists it usually means the person did not give a work address, which lowers the value of the lead.
How do I verify a whole list?
Use the API with your trial credits, or the Google Sheets, Zapier or Make recipes on the integrations pages. A CSV uploader is on the roadmap.