Instantly check whether an email address is valid, active, and deliverable. SMTP verification confirms real mailboxes in under 2 seconds. No signup, 100 free checks daily.
Enter any address and get a full validity report. BillionVerify checks syntax, domain, MX records, and connects directly to the mail server to confirm the mailbox is valid and accepts mail.
Six validation layers confirm whether an email address is valid and deliverable.
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 determine whether an email address is valid and ready to receive 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 validation time
99.9%
Accuracy
Multi-layer validation
100
Free Daily Checks
No signup required
6
Validation Layers
Per address checked
Each tool targets a specific deliverability problem.
Identificeer en blokkeer tijdelijke e-maildiensten voordat ze uw lijst vervuilen.
Detecteer e-mails die waarschijnlijk stuiteren voor verzending om uw afzenderreputatie te beschermen.
Identificeert mailservers die alle e-mails accepteren, ongeacht het bestaan van het postvak.
Filtert generieke roladressen zoals info@, support@, admin@ die de betrokkenheid schaden.
Checking validity is one part of the picture. These guides cover the related questions people ask most.
Validation runs through four layers: syntax check for formatting errors, domain lookup to confirm the domain is registered, MX record resolution to confirm the domain can receive mail, and a direct SMTP connection to verify the mailbox accepts incoming messages — all in under 2 seconds.
BillionVerify achieves 99.9% accuracy by combining syntax, DNS, MX, and direct SMTP verification. This multi-layer approach catches invalid addresses, inactive mailboxes, and misconfigured domains that single-step validators miss.
An email is invalid if it has a formatting error (missing @ or dots), an unregistered domain, no MX records, or an inactive mailbox that the mail server rejects. BillionVerify checks all four layers to give a definitive valid or invalid result.
Yes. BillionVerify cross-references every address against a database of 10,000+ known disposable and temporary email services and flags them as risky even if the mailbox technically exists.
Yes. You get 100 free validations every day with no signup and no credit card required. Every validation includes full SMTP verification, MX record checks, and disposable detection.
No. All validations happen in real time and we never store the addresses you submit. Data is encrypted in transit and deleted immediately after processing.
Ontdek alle krachtige functies die BillionVerify biedt
100 free validations daily. SMTP verification confirms valid mailboxes in under 2 seconds.
100 free validations daily · No signup required · Results in under 2 seconds
