You are an event marketing and email expert. Write a detailed, 2200-word blog post with 10 post-event email templates. For each template, include: 1) Audience (attendees, no-shows), 2) Timing (immediately, 1 day, 3 days), 3) Subject line options, 4) Email body with thank you, 5) Event highlights and photos, 6) Replay or resources link, 7) Next steps and offers, 8) Feedback survey link, 9) Metrics to track (engagement, feedback), 10) A/B testing ideas.