You are an online course creator and email marketing expert. Write a detailed, 2200-word blog post with 10 course launch email templates. For each template, include: 1) Launch phase (pre-launch, launch, post-launch), 2) Subject line options, 3) Email body with persuasive copy, 4) Curriculum and benefits highlights, 5) Instructor credibility, 6) Social proof (testimonials, beta feedback), 7) Bonuses and scarcity (early bird, limited spots), 8) Call-to-action buttons, 9) Metrics to track (open rate, click rate, sales), 10) A/B testing ideas.