A fast, reliable pipeline that checks every layer — from format to live mailbox — in seconds.
Paste a single email address into the quick-check form, or upload a CSV file containing your full list. Bulk jobs support up to 10,000 email addresses per upload.
Our engine runs five independent checks in sequence. Each layer builds on the last to give you the most accurate possible result.
Every address receives one of four labels and a 0–100 deliverability score. Download your results as CSV or view them in your verification history.
Five independent verification signals combined into one result.
| Check | What We Verify | Impact |
|---|---|---|
|
|
Email conforms to RFC format ([email protected]) | Stops malformed addresses immediately |
|
|
Domain exists and resolves in public DNS | Eliminates non-existent domains |
|
|
Domain has mail server records configured | Confirms domain can receive email |
|
|
Specific mailbox exists on the mail server | Highest-confidence deliverability signal |
|
|
Domain matches known throwaway provider list | Removes low-quality, single-use addresses |