VaultSandbox VaultSandbox.Client by: VaultSandbox .NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 370 total downloads last updated 1/14/2026 Latest version: 0.7.0 email testing smtp ci-cd quantum-safe vaultsandbox Official .NET client for VaultSandbox email testing API with quantum-safe encryption