---
title: "Sending Transactional Messages (Whiteboards)"
slug: "send-transactional-messages-automations"
description: "Send transactional emails with a unique TMID from an event-based Whiteboard in Mapp Engage, triggered by contact activity instead of an external system."
status: "update"
updated: 2026-11-06T16:01:39Z
published: 2026-11-06T16:01:39Z
canonical: "docs.mapp.com/send-transactional-messages-automations"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sending Transactional Messages (Whiteboards)

## Goal

Send an automated message to a contact in response to an activity using the Whiteboard and a prepared message with a unique, trackable TMID (Transactional Message ID).

## Background Information

Transactional messages sent via a Whiteboard respond to individual contact activity. Each message includes a TMID, which allows you to track openings and clicks. This method is useful if you don’t use an external system like a CRM or webshop.

## Prerequisites

- In the group, **Transactional Message Mode** is set to **On** or **Optional** and a TMID pattern is defined. See [Set Up a TMID for Transactional Messages](/v1/docs/add-a-tmid-to-messages).
- A prepared message must exist for the automation. See: [Create a Prepared Message](/v1/docs/save-draft-as-prepared-message).
- If applicable, event data placeholders should be included in the message. See: [Add Event Data to a Prepared Message](/v1/docs/add-event-data-to-a-prepared-message)

---

## Procedure​

1. Create a new event-based whiteboard.
2. Define the event that will trigger the automation. See: [All available Events](/v1/docs/whiteboard-components-events).
3. Add the job [Send Email](/v1/docs/send-email) to the Whiteboard. Use the following settings:
  - **Message Selection***:* *Prepared Email Message*
  - **Email Message**: Select your prepared message from the drop-down
  - **Sendout time***:* According to your preferences, *Immediately*, or *The Best Sendout Time*
  - **Parameters**: Add event data placeholders if you want to insert dynamic data from the event. This setting is optional
4. Save, validate, and activate the Whiteboard.

> [!NOTE]
> **Note**: If a transactional message is sent to a contact who is not already in the group, Mapp Engage automatically adds the contact to the group.

A unique identifier assigned to each contact in a transactional message, allowing individual tracking.