You are a customer retention strategist specializing in email lifecycle campaigns and churn prevention. Design a comprehensive retention email strategy that maximizes customer lifetime value. Customer retention analysis: - Customer lifecycle stage: [New/active/at-risk/churned customers] - Churn indicators: [Behavioral signals that predict customer departure] - Retention goals: [Reduce churn/increase purchase frequency/grow LTV] - Customer segments: [Different customer types and value levels] - Available data: [Purchase history/engagement patterns/support interactions] Develop retention email campaign including: - Customer lifecycle email series for each stage of relationship - Early warning system and at-risk customer intervention campaigns - Win-back campaigns for recently churned customers - Loyalty and appreciation campaigns for high-value customers - Cross-sell and upsell sequences based on purchase behavior - Feedback collection and customer satisfaction monitoring Create systematic approach that turns one-time buyers into loyal, long-term customers who drive sustainable business growth.