Production-Like Email Testing Without Mocks
Click to view full sizeVaultSandbox is a self-hosted SMTP testing gateway designed to simulate real email server behavior for more accurate testing in development environments. Unlike traditional email mocks, VaultSandbox provides comprehensive features such as TLS, DNS, authentication, spam filtering, and chaos engineering, ensuring that email tests mimic production environments. This allows developers and QA teams to detect issues like TLS negotiation and DKIM validation before reaching production, reducing surprises and improving reliability. The solution accommodates various deployment methods, supports multiple programming languages through SDKs, and offers features like zero-knowledge encryption and per-inbox customization to cater to privacy and security needs. VaultSandbox is built to integrate seamlessly into CI/CD pipelines, enabling deterministic waits and robust email handling without polling. While the core gateway is open source and free, additional enterprise features are available for teams with more extensive compliance and collaboration requirements.
Email tests with mocks miss real SMTP failures until production.
Self-hosted SMTP gateway with TLS/DNS/auth/spam and chaos for realistic tests.
Backend devs and QA teams testing email flows in CI.
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