Verify any email address is real, valid, and deliverable in under 2 seconds. 99.9% SMTP-level accuracy. No signup required — 100 free verifications daily.
Enter any email address to verify it is real and deliverable. BillionVerify checks syntax, domain health, MX records, and connects directly to the mail server to confirm the mailbox exists and accepts mail — in under 2 seconds.
Six verification layers run automatically on every address you verify.
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 steps verify whether an email address is real and deliverable.
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.
Verification runs four steps: syntax check for formatting errors, domain lookup to confirm registration, MX record resolution to verify the domain accepts mail, and a direct SMTP connection to the mail server to confirm the specific mailbox exists. Results are returned in under 2 seconds.
BillionVerify achieves 99.9% accuracy by combining syntax validation, DNS lookups, MX record checks, and direct SMTP verification. This multi-layer approach catches invalid, inactive, and risky addresses that single-step verifiers miss.
SMTP (Simple Mail Transfer Protocol) verification is the process of connecting directly to the mail server and asking whether it will accept mail for a specific address. It is the most reliable verification method because it tests the actual inbox rather than just the domain or format.
Yes. Upload a CSV to verify thousands of addresses at once and download a cleaned list in minutes. Or use the real-time API to verify addresses programmatically as they come in from your forms, CRM, or signup flows.
Yes. You get 100 free verifications every day with no signup and no credit card required. Every verification includes full SMTP verification, MX record checks, disposable detection, and role account analysis.
No. All verifications happen in real time and we never store the addresses you submit. Data is encrypted in transit and deleted immediately after processing.
探索 BillionVerify 的所有強大功能
100 free verifications daily. SMTP verification confirms real mailboxes in under 2 seconds.
100 free verifications daily · No signup required · Results in under 2 seconds
