What problem does it solve? Developers working on transactional emails in the OrignaGTA marketplace need a single reference for how Mailjet is configured, which email functions exist, and when each notification fires, avoiding guesswork across a 733-line service file. ## Core Features & Use Cases - Configuration Reference: Documents the sender address, Mailjet provider setup, the FORCE_REAL_EMAIL environment variable, and the APP_BASE_URL emulator/production switch. - Trigger Mapping: Maps each email function (order confirmation, seller notification, capture failure, 3DS authentication, authorization expired) to its exact trigger point. - Template Design System: Specifies the ORIGNA brand gradient, order status tracker, glassmorphism price summary, and responsive CTA button patterns used across templates. - Use Case: When adding a new order notification, consult this Skill to find the correct function in functions/services/email_service.py, match the existing template design system, and test real sends in the emulator. ## Quick Start Ask the AI to add a new order status email using the email-system reference and test it with FORCE_REAL_EMAIL enabled in the emulator.