Outpost v0.4.0 has been released, introducing support for Azure Service Bus as an event destination, enhancing its flexibility for developer tools on Microsoft and Azure infrastructures. Outpost is a self-hosted event delivery service that offers at-least-once delivery, event fanout, and observability features while allowing for multi-tenant support and configurable retries. It enables users to control and observe how events are delivered to multiple destinations like webhooks and message queues. The release emphasizes the benefits of self-hosting, such as compliance, performance, and cost efficiency, particularly useful for platforms with webhooks, high-volume event streams, and event-driven architectures. Outpost provides tools for creating tenants, defining destinations, and publishing events using TypeScript, Go, and Python SDKs, allowing extensive integration and control over event delivery infrastructure.