Instantly check if an email address exists and has an active inbox. SMTP verification confirms real, deliverable addresses in under 2 seconds. No signup, 100 free checks daily.
Enter any address and get a definitive answer — does this email exist? BillionVerify runs syntax, domain, MX, and SMTP checks to confirm the inbox is real and accepting mail.
Six verification layers confirm whether an email address exists and can receive mail.
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 steps confirm whether an email address exists and accepts mail.
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 existence check
99.9%
Accuracy
Multi-layer verification
100
Free Daily Checks
No signup required
6
Verification Layers
Per address checked
Each tool targets a specific deliverability problem.
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 checker runs your address through four layers: syntax validation, domain lookup, MX record check, and a direct SMTP connection to the mail server. The SMTP handshake confirms whether the inbox exists and accepts incoming mail — returning a result in under 2 seconds.
BillionVerify achieves 99.9% accuracy by combining DNS, MX, and direct SMTP verification. This multi-layer approach catches invalid addresses, closed accounts, and misconfigured domains that basic validators miss.
A non-existent email means the mailbox is not active on the mail server. Sending to it will produce a hard bounce, which damages your sender reputation. Removing these addresses before sending keeps your bounce rate low.
A catch-all domain accepts mail for any address, even non-existent ones. BillionVerify flags catch-all domains so you know the result is uncertain. Our catch-all verifier tool provides deeper analysis for these domains.
Yes. You get 100 free checks every day with no signup and no credit card required. The free tier includes full SMTP existence verification on every address.
No. All checks run in real time and we never store the addresses you submit. Verification data is encrypted in transit and deleted immediately after processing.
Descubra todas las potentes funciones que ofrece BillionVerify
100 free checks daily. SMTP verification confirms real inboxes in under 2 seconds.
100 free checks daily · No signup required · Results in under 2 seconds
