VaultSandbox – Production-Like Email Testing Without Mocks

Summary: VaultSandbox enables real email testing by validating TLS, DNS, and SPF/DKIM within your VPC without changing your provider or configuration.

What it does

It swaps the email recipient to perform full protocol validation inside your VPC, supporting providers like Postmark, SendGrid, and SES.

Who it's for

Developers and teams needing accurate email delivery testing without using mocks.

Why it matters

It ensures email security and configuration correctness by testing in a production-like environment internally.