Email applications for developers
Postal Systems builds email software that plugs straight into your product. Our flagship, EmailEngine, is a self-hosted email API that turns any IMAP or SMTP account into a clean REST API with real-time webhooks—so you can send, receive and sync email from your own code without touching the raw protocols.
Every product starts with a free 14-day trial. Generate and manage your license keys, subscriptions and team from this account portal. See plans and pricing.
Our products
EmailEngine
A self-hosted email integration platform. Connect any IMAP and SMTP account and work with it over a unified REST API and webhooks—ideal for CRMs, help desks, AI agents and any app that sends or reads email at scale.
Ethereal Email
A free fake SMTP and IMAP service for developers. Capture and preview the email your app sends in tests—nothing is ever delivered to real recipients. Part of the Nodemailer project.