Chilling True Story: Double Opt-in List Gets Spam-Blocked

Posted on by Chief Marketer Staff

Anti-spammers and others promote double opt-in as the only fail-safe way to build a permission-based e-mail marketing list. But one e-mail service provider recently found its messages blocked by a major Internet service provider because of the very confirmation process designed to prevent spam.

The problem: A so-called spambot

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