Pipeline

Table of contents

  1. Overview

Overview

A pipeline is the per-route transformation chain that runs only after a route rule matches an incoming email. It consumes the parsed message plus route context and emits a JSON payload; that payload is posted verbatim to the route’s endpoint.

The default step is map.generic_json, which emits the deterministic mailwebhook.generic@1 shape described in Generic JSON. Attachments stay out of the HTTP body and only their metadata is included, keeping delivery fast and reliable.

For custom outputs, map.custom_json lets you define a JsonLogic-based mapper validated by JSON Schema, producing whatever JSON shape your downstream system expects. See Custom JSON for the mapper spec, supported operators, and runtime limits.

Table of contents