Answers to the common questions.

Every address goes through six stages: syntax, domain and MX records, disposable and role-account lists, a live SMTP handshake with the domain's mail server (we stop before sending anything), a catch-all probe, and a scored verdict. You see each stage settle in real time.

No. Verifyre opens an SMTP conversation and asks the server whether the mailbox exists (RCPT TO), then disconnects. No message is ever delivered and the recipient sees nothing.

Addresses marked deliverable are confirmed by the receiving mail server itself, so bounce rates on cleaned lists typically fall below 2%. Some providers (Yahoo, and catch-all domains) refuse to confirm individual mailboxes; those come back as risky or unknown with the reason, never as a guess.

A catch-all domain accepts mail for any name, so the server says yes even for mailboxes that do not exist. Mail may still bounce later. Verifyre detects this by also trying a random address, and scores the result so you can decide whether to send.

Verification runs in parallel with polite per-domain limits. Ten thousand addresses usually finish in a few minutes; very large lists run in the background and we email you when they are done.

Never. Buy a pack once and use it whenever you need it. Duplicates and malformed addresses are removed free before anything is charged.

Lists are kept only as long as you want the results: delete a job and every address in it is removed immediately. Lists are never shared, sold or used to build any dataset. Integration credentials are encrypted at rest.

Yes. Connect Mailchimp, Klaviyo, Brevo, HubSpot, ActiveCampaign, MailerLite, Kit, GetResponse, Campaign Monitor, SendGrid and more with an API key. Pick an audience, verify it, and push results back as tags or unsubscribes.

120 requests per minute per key by default, with bulk endpoints for larger batches and webhooks when a job completes. Higher limits are available on request.

cURL, JavaScript (Node and browser), Python, PHP, Ruby, Go, Java and C#. The API is plain JSON over HTTPS, so anything that can make an HTTP request works.

Yes. Email addresses are processed as a data processor on your instructions, stored encrypted, and deleted on request or when you delete a job. A data processing addendum is available for business customers.