Generate a structured H2/H3 blog outline from a topic. Use as a starting framework for long-form posts.
# Email warmup strategy
## Introduction
- Hook with a surprising stat about email warmup strategy
- Promise of what reader will learn
- Quick TOC
## What is email warmup strategy?
- Definition
- Why it matters in 2026
- Common misconceptions
## The step-by-step approach
### Step 1: [foundational step]
### Step 2: [build-up step]
### Step 3: [advanced step]
## Common mistakes to avoid
- Mistake #1: [description]
- Mistake #2: [description]
- Mistake #3: [description]
## Tools & resources
- Tool 1
- Tool 2
- Free template / cheat sheet
## Conclusion
- Recap the 3 main takeaways
- Single clear CTA (subscribe, try product, share)
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*Suggested length: 1,800-2,500 words. Internal links: 3-5. External authoritative links: 2-3.*