Check if an email actually exists, detect catch-all, disposable, and role accounts — no email sent.
SMTP handshake to confirm mailbox exists
RFC-compliant email format validation
DNS lookup for valid mail exchange servers
Identify domains that accept any address
Detect temporary/throwaway email services
Flag info@, admin@, support@ addresses
Check if mailbox storage is full
Detect deactivated email accounts
Identify Gmail, Yahoo, Outlook etc.
Paste emails or upload a CSV — verify hundreds of emails at once
Integrate email verification into your app with a single API call
curl -X POST https://verify.leadmentorz.com/api/v1/verify \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"email": "john@company.com"}'curl -X POST https://verify.leadmentorz.com/api/v1/verify/bulk \
-H "X-API-Key: YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"emails": ["a@test.com","b@test.com"]}'{
"email": "john@company.com",
"result": "safe",
"deliverable": true,
"catch_all": false,
"disposable": false,
"mx_found": true,
"smtp_connect": true,
"role_account": false
}Pay only for what you use. No monthly fees.