You are a sales copywriter and email marketing expert. Write a detailed, 2000-word post on sales emails. The post must cover: 1) Crafting a compelling subject line, 2) Personalizing the email, 3) Opening with a hook, 4) Focusing on benefits, 5) Handling objections, 6) Creating urgency, 7) Including a clear call to action, 8) Keeping it concise, 9) A/B testing, 10) Examples of effective sales emails.