I Built an AI Tool to Fix Outlook Email Compatibility Issues (Here's How)

If you've ever tried to create HTML emails, you know the pain. What looks perfect in Gmail falls apart in Outlook 2016. Flexbox? Grid? CSS variables? Forget about it. We're still coding like it's 1999. The Problem Last month, I spent 2 hours debugging a simple promotional email. ChatGPT gave me clean, modern HTML. It looked great in Chrome, fine in Gmail, and completely broken in Outlook. The issues? Divs don't render consistently Flexbox is a no-go CSS variables aren't supported Outlook has its own special "features" I needed table-based layouts, inline CSS, and conditional comments. Writing that by hand feels like time travel to the The Secret Sauce: Prompt Engineering The magic isn't in the model—it's in the constraints: You are an expert email HTML developer. CRITICAL RULES: 1. Use <table> layout only. NO <div> for structure. 2. All CSS must be inline (style="..."). NO <style> tags. 3. NO Flexbox, Grid, or CSS variables. 4. Images must have width/height and alt attributes. 5. Butto