The Email Sender is a minimal, production-ready server designed to empower Claude Desktop with direct email sending capabilities. It acts as a secure intermediary, connecting Claude Desktop to Mailjet's robust API for reliable email delivery, all communicated over Server-Sent Events (SSE). This server prioritizes security by requiring API token authentication for all requests and never storing user email credentials. Users can simply ask Claude to send emails, and the server will prompt for Mailjet API keys upon first use, enabling a seamless and secure email workflow.