Free Single Email Validator
Free Email Deliverability Checker
Instant RFC 5322 syntax validation, authoritative DNS MX resolution, and burner domain filtering.
Quick Test:
RFC Syntax
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MX Server
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Disposable / Burner
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Account Classification
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Clean bulk lists via CSV or Developer API
Upload thousands of leads or connect your outbound stack programmatically.
RFC 5322 Syntax Engine
Validates domain labels, local-part characters, and catches common domain typos automatically.
Authoritative MX Routing
Queries authoritative nameservers to verify active mail exchangers capable of receiving delivery.
Zero-Send Handshake Safety
Inspects mail server responses without ever delivering unsolicited messages to recipient inboxes.