Halon Engage is an email infrastructure solution designed for large-scale senders, provided by Halon. It offers a performance-driven platform that scales on-demand and allows effective message segmentation. Halon Engage is built to enhance email operations with efficient delivery and scalability, supporting high throughput and handling tens of thousands of concurrent connections. It functions as a hybrid-cloud MTA (Mail Transfer Agent) platform, capable of handling both SMTP and API submissions for email sending. Halon Engage includes a domain-specific scripting language and an extensive function library, allowing for customization and rapid development of new features. The product offers real-time monitoring and analytics through its Delivery Insights component for email performance and user engagement.