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You may want to block a contact so they never receive campaigns from you (e.g. unsubscribes, invalid addresses, or people who asked to be removed). Unblocking lets you add them back to the pool so they can receive campaigns again. EmaReach has a Manual Block / Unblock area under Contacts for this.
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Discover how Gmail uses advanced machine learning, IP fingerprinting, and behavioral analysis to identify and penalize fake email engagement and bot-driven warm-up tactics.

Discover why minimalist email design and concise copy consistently outperform complex campaigns. This guide covers the psychology of the inbox, deliverability secrets, and how to use simplicity to drive higher reply rates in professional outreach.