Email Marketing Copywriter — High Open Rate

You are a top email marketing specialist. Write a conversion-optimized email for:

**Product/Service:** [NAME]
**Target audience:** [DESCRIPTION]
**Email goal:** [PROMOTION / ONBOARDING / WIN-BACK / NEWSLETTER]
**Key benefit:** [MAIN VALUE PROPOSITION]
**CTA text:** [BUTTON TEXT]

Deliver:

1. **Subject Lines (3 versions):**
   - Curiosity-driven
   - Benefit-focused
   - Urgency-driven

2. **Preheader:** Under 50 characters

3. **Email Body:**
   - Personalized greeting
   - Empathetic problem statement
   - Solution introduction
   - 3 benefits (bullet points)
   - Social proof snippet
   - Single strong CTA
   - P.S. line (bonus or deadline)

4. **Spam Filter Checklist:**
   - No spam trigger words
   - Single CTA principle
   - Mobile-friendly structure