Multi-layer verification: syntax, DNS, live SMTP, MX records, SPF, and DMARC checks. No signup required for your first 5 lookups.
Every email goes through a multi-layer verification pipeline before it reaches your CRM, outreach tool, or data warehouse.
RFC-compliant format checks catch typos and malformed addresses before they ever hit a server.
DNS resolution confirms the domain exists and is configured to accept mail.
We connect to the mail server and confirm the specific mailbox exists - no email sent.
Enumerate all mail exchange servers and identify the primary handler.
Check anti-spoofing policies. Domains without SPF/DMARC are flagged as higher risk.
Detect disposable email providers and catch-all domains that accept everything.
Integrate email verification into your application, pipeline, or workflow. One endpoint. One API key. Full verification results in under two seconds.
Use the tool that fits your workflow - manual lookups, built-in integration verification, or our REST API.
Paste an email above and get instant results. No account required for your first 5 checks.
Connect a CRM or import a CSV. Every contact is verified automatically as it enters LeadLeap.
POST to /v1/validate with your API key. Get full verification results in your own app or pipeline.
Start verifying emails today - free lookups included, API access on every paid plan, and 1-click verification on every integration import.