What is an email validation tool?
Email validation tools verify that email addresses are deliverable before you send. They check syntax, domain validity, and mailbox existence to identify addresses likely to bounce, protecting **sender reputation** from failed delivery attempts.
Validation methods include: syntax checking (format correctness), domain validation (**DNS** and MX records), mailbox verification (**SMTP** probing), and risk assessment (disposable, **spam trap** indicators). Different tools emphasize different methods.
Value comes from: reducing bounce rates that damage reputation, avoiding **spam traps**, improving list hygiene, and enabling confident sending to validated addresses. Validation is preventive maintenance for list health.
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