Blocked recipients (bounce, complaint, or manual). Sends to suppressed addresses are rejected before queueing.
Hard bounces and spam complaints from the delivery stack add entries automatically. Subscribe to webhooks so your app can mirror suppressions locally.
List and delete suppressions via the dashboard or REST API (scopes as configured for your deployment). Honor complaint and hard-bounce suppressions before removing entries.
Documentation
Quickstart, API reference, and webhooks—everything you need to send from your app.