What is an email validation vendor?
An email validation vendor checks whether addresses are deliverable, risky, disposable, or malformed. It performs SMTP level checks by issuing a `RCPT TO` command, reading the server’s response, then issuing a `QUIT` without sending mail. It also runs DNS checks, typo detection, and risk scoring. Examples include Bouncer, ZeroBounce, and validation systems built into platforms like Review My Emails. It is the trusted dock inspector ensuring every passenger on your ship is real, reachable, and safe to carry.
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