Inboxes

Register before sending

Use the first-email recipe to register a deterministic inbox and keep its returned address. Guessing an address does not register it. The API key and inbox must belong to the same project.

Isolate each test run

Give each independent journey a fresh run ID. For repeatable suites, fixture manifests provision named inboxes and detect drift without clearing existing mail.

Inspect and clean up

Watch arrivals under Project → Inboxes in the console. Read full message content with a project-authenticated client. After producers and waits finish, clean up the exact run or let its configured retention expire.