Guides

Use these guides when you are building something that should live outside one send call: a reusable plugin, a custom provider adapter, a community package, or test helpers around email 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.

Test

Test email behavior

Use memory providers and capture plugins to assert send behavior.

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