testing-with-sandbox

You can capture outbound email in staging by routing messages to an isolated sandbox, preventing delivery to real recipients while enabling inspection. This requires a sandbox inbox id and a testing-scoped API token to intercept messages safely.

Yes, you can use sandbox SMTP credentials for integration testing by configuring your application to target sandbox.smtp.mailtrap.io. This captures outbound messages safely for inspection without delivering them to actual end users.

Testing outbound email works by sending messages via HTTP API or SMTP into sandbox endpoints, intercepting the delivery for validation. You can inspect HTML bodies, headers, and attachments to debug templates and verify integration workflows.

The best way to validate email templates in a CI pipeline is to read captured messages from the Sandbox API to assert delivery behavior and template rendering. This automates inspection of HTML bodies and headers during integration testing.

Yes, you need a sandbox inbox id and a testing-scoped API token to test outbound email. These credentials ensure your development messages are routed to the isolated sandbox for inspection rather than reaching real recipients.

Your development emails are not delivering to end users because they are being captured in isolated sandboxes. This mechanism prevents accidental delivery to real recipients, routing outbound messages to sandbox endpoints for safe inspection instead.