useSend is an email marketing platform and transactional delivery system built to manage bulk campaigns and individual messages using AWS SES for delivery. It provides a RESTful API, an SMTP relay gateway, and a visual management interface for designing HTML templates and coordinating email broadcasts.
The platform distinguishes itself by translating legacy SMTP traffic into modern API calls and implementing an event-driven webhook system. This system pushes real-time delivery, bounce, and click notifications to external servers using HMAC-SHA256 signed payloads to ensure authenticity.
The system covers a broad range of capabilities, including mailing list administration with subscriber verification, domain ownership validation via DNS records, and campaign scheduling. It also features engagement tracking for monitoring open rates and sender reputation, alongside tools for contact book organization and bulk recipient imports.
The project supports containerized deployment and can be launched as a managed instance via cloud infrastructure templates.
