coss.comdocs

Download a received email's raw message

GET
/v1/received_emails/{id}/raw

The whole message as received (message/rfc822), for your own MIME parser or archive.

Authorization

bearerAuth
headerAuthorizationBearer <token>

A secret API key from the dashboard: coss_live_… for production environments, coss_test_… for sandbox environments.

Path Parameters

id*string

The received email's id.

Header Parameters

Coss-Version?"2026-10-10"

The API version (a date) to use for this request. Defaults to your organization's version, pinned to the latest one when it first used the API and upgraded from the dashboard. The SDK always sends the version it was built for.

Value in"2026-10-10"

Response Body

The raw message.

response?filemessage/rfc822
Formatbinary
import { Coss } from "coss";const coss = new Coss({  apiKey: process.env.COSS_API_KEY,  baseUrl: "https://api.coss.com",});const { data, error } = await coss.email.received.getRaw("rcvd_01k7c8m4q2f3e9v6t5r1n0p8yz");
"string"