# Maestro Builder — maestro-builder

> Drag-and-drop visual builder for bulletproof responsive HTML emails. Outlook 2007 onward, dark-mode-aware, real Mailjet test sends.

**License:** MIT + attribution
**Status:** shipped

**Stack:** next.js 16 · 30 modules · mjml · vml bulletproof · zustand

- Live preview canvas — click any module in the rendered email to select it; the right panel re-renders with that module's typed properties
- Bulletproof Outlook via <v:roundrect> buttons and <v:image> + <v:rect> overlay-on-photo hero pattern, all derived from Litmus + Email-on-Acid references
- Send a test in two clicks via Mailjet, with friendly error guidance for the validation-hold and sender-not-verified states

GitHub: https://github.com/MetalHacker01/MaestroBuilder
Live: https://aldorino.is-a.dev/projects/maestro-builder

*Last generated: 2026-05-21*