Check any email address for syntax errors, domain validity, MX records, and SMTP deliverability in under 2 seconds. 99.9% accuracy. No signup, 100 free checks daily.
Enter any email address and receive a full validation report. BillionVerify checks syntax, domain health, MX records, SMTP mailbox status, disposable email detection, and role account analysis — all in one result.
Six layers of validation run automatically on every address you check.
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 automated verification steps run on every address you check.
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 validation
100
Free Daily Checks
No signup required
6
Validation Layers
Per address checked
Each tool focuses on a specific risk type.
Identify and block temporary email services before they pollute your list.
Detect emails likely to bounce before sending, protecting your sender reputation.
Identify accept-all mail servers that mask actual mailbox existence.
Filter out generic role addresses like info@, support@, and admin@ that hurt engagement.
The checker runs each address through four steps: syntax validation for formatting errors, domain lookup to confirm registration, MX record check to verify mail delivery is possible, and a direct SMTP connection to confirm the mailbox accepts incoming mail. Results are returned in under 2 seconds.
BillionVerify achieves 99.9% accuracy by combining syntax validation, DNS lookups, MX record resolution, and direct SMTP verification. This multi-layer approach catches invalid, inactive, and risky addresses that single-check validators miss.
The checker detects syntax errors (missing @ symbol, invalid characters, malformed structure), unregistered domains, missing MX records, inactive mailboxes, disposable email addresses, and role-based accounts like info@ and support@.
Yes. Upload a CSV to verify thousands of addresses in bulk and download cleaned results in minutes. Or use the real-time API to check addresses programmatically as they come in from your forms or CRM.
Yes. You get 100 free checks every day with no signup and no credit card required. The free tier includes every validation feature — syntax, domain, MX, SMTP, and disposable detection.
No. All checks run in real time and we never store the addresses you submit. Data is encrypted in transit and deleted immediately after processing.
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100 free checks daily. Full SMTP validation on every address in under 2 seconds.
100 free checks daily · No signup required · Results in under 2 seconds
