Verify any email address is real, valid, and deliverable in under 2 seconds. 99.9% SMTP-level accuracy. No signup to start — 100 free verifications a day.
Enter any address and the email verifier returns a full deliverability report in under 2 seconds — syntax, domain, MX records, SMTP mailbox check, disposable detection, and role account check, all in one result.
Six layers of verification run automatically on every address.
Checks format and structure for typos, invalid characters, and malformed addresses.
Verifies the domain exists and is configured to receive email.
Confirms active mail server records are present for the domain.
Connects directly to the mail server to confirm the mailbox accepts mail.
Flags temporary email services from a database of 10,000+ known domains.
Identifies generic addresses like info@, support@, and admin@ that hurt engagement.
Four verification layers run in sequence on every address.
Validates email syntax and detects common typos or malformed addresses.
Checks domain existence and resolves MX records to confirm mail delivery is possible.
Connects to the mail server and tests whether the mailbox accepts incoming mail.
Scores the address for disposable, role, catch-all, and spam trap risk.
<2s
Response Time
Average SMTP verification
99.9%
Accuracy
Multi-layer verification
100
Free Daily Verifications
No signup required
6
Verification Layers
Per address verified
Each tool focuses on a specific risk type.
Identifica y bloquea servicios de email temporales antes de que contaminen tu lista.
Detecta emails propensos a rebotar antes de enviar, protegiendo tu reputación de remitente.
Identifica servidores de correo que aceptan todos los mensajes sin importar la existencia del buzón.
Filtra direcciones genéricas como info@, support@ y admin@ que perjudican el engagement.
The email verifier runs each address through multiple checks automatically. First it validates syntax, then resolves the domain's MX records, then connects to the mail server over SMTP to confirm the mailbox exists — returning a full result in under 2 seconds.
The verifier achieves 99.9% accuracy by combining syntax validation, DNS and MX lookups, and direct SMTP verification. This multi-layer approach catches invalid, disposable, and risky addresses that basic verifiers miss.
Yes. You get 100 free verifications every day with no signup and no credit card required. The free tier includes every check — syntax, domain, MX, SMTP, and disposable detection.
Yes. Upload a CSV to verify thousands of addresses at once and download cleaned results in minutes, or call the real-time API to verify addresses programmatically as they come in.
They do the same core job — confirming an address is real and deliverable. "Verifier" usually emphasises the SMTP mailbox check that proves an inbox exists, which is exactly what BillionVerify runs on every address.
No. Verification happens in real time and we never store the addresses you submit. Data is encrypted in transit and deleted immediately after processing.
Use BillionVerify's free email verifier — enter any address above and get results in under 2 seconds, no signup needed. The online verifier runs a full SMTP check including syntax validation, MX record lookup, and direct mailbox confirmation. You get 100 free online verifications per day.
BillionVerify is a free email verifier tool that checks every address with real SMTP verification — not just syntax or DNS lookups. It detects disposable emails, role accounts, and risky addresses in under 2 seconds. The email verifier tool is free for 100 checks per day with no signup required. For bulk needs, our email verification service starts at $20 for 20,000 credits.
100 free verifications daily. No signup, no credit card. Full SMTP verification on every address.
100 free verifications daily · No signup required · Results in under 2 seconds
