Allows email submission over REST/HTTP using JSON payloads, aligning with the SparkPost Transmissions API standard.

The old interface was replaced with a modern SPA that updates performance metrics in real time without needing page refreshes.

Features autocomplete support in the console to prevent operator errors. 2. HTTP APIs and Webhooks

Inbound emails and tracking data can be pushed directly to your web application via HTTP POST requests. 3. Outbound Proxy Support PowerMTA 5.0 released - Postmastery