Anyone using AI cross-reviews to fix broken HTML email templates for Outlook/Gmail?

Claude writes the table-based HTML layout -> ChatGPT checks Outlook rendering quirks -> Perplexity verifies dark-mode CSS compatibility

HTML emails feel like coding in 1999 tables inside tables, inline CSS everywhere and Outlook breaking every single button you design!

One AI generates modern CSS flexbox layouts that look amazing in Apple Mail but look totally destroyed in desktop Outlook, while another writes bulletproof legacy HTML that looks boring on dark mode mobile clients. Combining their inputs gets me templates that actually render everywhere.

How do you tackle email coding with AI: single prompt, generator + tester, or multi-model passes?