---
title: Send an email triggered by External Signal (Luma)
slug: docs/send-an-email-triggered-by-external-signal-luma
docTags: 
createdAt: 2026-03-13T16:48:35.226Z
---

## Overview 

This workflow sends an email when it receives an **HTTP-triggered External Signal**, then:

1. Extracts an **email parameter** from the incoming request
2. Finds the matching recipient in the recipient table
3. Sends an email via the **Send Email** activity (configured as **Recurring delivery**)

![](https://api.archbee.com/api/optimize/bAgVaanSi1tFmfc8PghaH/5Uiqtr81PUjBh3zdkUD5p_cleanshot-2026-03-13-at-174852-2x.png)

***

## Demo Environment

- IMS Org: Adobe Demo System Shared
- Campaign workflow: **[Luma - Send an email triggered by External Signal](https://experience.adobe.com/#/@demosystem4/so\:demosystem4-mkt-prod1/acc/xtkWorkflow/554286933)**

***

## Demo Execution  (Step-by-step)

::Image[]{src="https://api.archbee.com/api/optimize/bAgVaanSi1tFmfc8PghaH/jO7YyN-4cg4V3mg9K-s5z_cleanshot-2026-03-13-at-180217-2x.png" size="60" width="834" height="284" position="center" caption="Postman HTTP requests" alt="Postman HTTP requests" showCaption="true"}

1. Download the **Postman Collection & Environment**
2. Import the **[Collection](https://adobe.sharepoint.com/\:u:/s/DemoSystemNext/IQCN7D2fvhhDT4zCv7uUD9Y2AXrN6UyyBasa2MObcamBnMs?e=W9E4Ei)** in Postman
3. Import the **[Environment](https://adobe.sharepoint.com/\:u:/s/DemoSystemNext/IQCL8BMnMRkRQb2hylXex6TWAYU5aC0a7-cf-341U6EhCEU?e=PtatIf)** in Postman
4. Update the recipient email in the **Trigger Workflow External Signal **POST request
5. In sequence, use the **Generate the IMS Access Token**, **Generate the Campaign V8**, then **Trigger The Workflow External Signal** HTTP requests

:::hint{type="info"}
<u>Note</u>: The generated access/security tokens are automatically passed to next HTTP requests.
:::

6. The workflow should be triggered and it will be visible **Workflow** **Logs**

![Workflow Logs](https://api.archbee.com/api/optimize/bAgVaanSi1tFmfc8PghaH/xptmEw9T-s-vPVn4ur3ZS_cleanshot-2026-03-13-at-180456-2x.png "Workflow Logs")