This article describes the Clean Start Validation approach for email marketers and deliverability teams. It explains why poor-quality email data entering a mailing list at sign-up is a growing risk, and describes the validation methods — real-time validation, first-click validation, and double opt-in — that senders can use to prevent invalid, temporary, and bot-generated addresses from affecting deliverability and engagement. Senders who apply these methods can build cleaner, more engaged subscriber lists and reduce compliance risk from the point of first contact.

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