Guides
Task-based guides for operating and extending Email SDK.
Use these guides when you are operating a production send path or building something that should live outside one send call: fallback routes, tests, reusable plugins, custom provider adapters, or community packages.
Operate
Production send pipeline
Combine adapters, validation, retries, fallback routes, observability, tests, and CLI checks.
Test email behavior
Use memory providers and capture plugins to assert send behavior.
Build
Create your first plugin
Build a policy plugin that blocks sends missing required metadata.
Create an adapter
Implement a provider adapter and expose it as a plugin.
Publish a community adapter
Shape package exports, docs, names, and tests for reuse.
Where reference lives
Guides are procedural. Use the reference pages when you need exact fields and contracts:
| Need | Page |
|---|---|
| Client options | Client |
| Message shape | Message |
| Adapter contract | Adapter contract |
| Plugin types and lifecycle | Plugin API |
| Provider field limits | Field support |