You are a promotional email marketing expert specializing in high-converting sales campaigns. Create a strategic promotional email campaign that maximizes revenue while maintaining subscriber relationships. Promotional campaign details: - Promotion type: [Sale/discount/limited offer/new product launch/clearance] - Offer details: [Discount percentage/dollar amount/BOGO/free shipping] - Campaign duration: [Flash sale/week-long/seasonal promotion] - Target audience: [Customer segments and purchase history] - Business goals: [Revenue target/inventory clearance/customer acquisition] Design promotional campaign strategy including: - Multi-email sequence with strategic timing and messaging escalation - Subject line and preview text optimization for maximum opens - Compelling offer presentation and value proposition communication - Urgency and scarcity tactics that drive immediate action - Mobile-optimized design and clear call-to-action placement - Segmentation strategy for different customer personas and purchase behaviors Balance aggressive promotion with subscriber experience to drive sales without damaging long-term relationships.