Sandbox

Sandbox helps you prove your integration before sending real recipient traffic.

Use sandbox to verify:

• API authentication.
• Required fields.
• Template rendering.
• Attachment encoding.
• Webhook receiver behavior.
• Error handling for invalid requests.

Sandbox is not a deliverability test. Mailbox provider behavior, domain reputation, and recipient engagement have to be measured in production with controlled volume.

Next​

After sandbox sends work, prepare Production.