What problem does it solve? Email HTML that works in a browser often breaks in Gmail, Outlook (Word HTML engine), Yahoo, or Apple Mail because those clients strip stylesheets, ignore flexbox/grid, and block scripts, SVG, and web fonts. This Skill audits rendered email HTML and produces prioritized fixes before messages are sent to real inboxes. ## Core Features & Use Cases - Compatibility audit: Classifies issues as blocker, high, medium, or low using a constraint checklist covering CSS, images, SVG, fonts, forms, links, tables, and dark mode, cross-checked against Can I email for specific features. - Rewrite guidance: Converts flex/grid layouts to nested tables, moves critical styles inline, replaces SVG and icon fonts with PNG, and fixes relative URLs to absolute HTTPS. - Blade source mapping: Maps rendered-HTML findings back to Laravel Blade mail views, flagging @vite bundled CSS, asset() relative URLs, and web-layout components that need email-specific partials. - Use Case: Before launching a Laravel notification campaign, render the mail Blade view with sample data, run the audit, and receive a severity-ranked issue table plus rewritten HTML that survives Outlook and Gmail. ## Quick Start Review this rendered email HTML from my Laravel Blade mail template for Gmail and Outlook compatibility and rewrite the parts that will break.