---
title: "System Messages via SMS"
slug: "system-messages-via-sms"
updated: 2025-07-25T15:19:42Z
published: 2025-07-25T15:19:42Z
---

> ## 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.

# System Messages via SMS

## Overview

System messages in Mapp Engage can be sent by email or SMS. By default, email is used as the sendout channel, even when SMS messaging is enabled.

This feature allows you to configure system messages, such as subscription confirmations or group invitations, to be sent as SMS messages instead of email. SMS-based system messages are beneficial when communicating with contacts primarily using mobile devices.

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### Rerequisites & Requirements

- SMS messaging must be enabled in your account setup.
- You must manually enable SMS sendout for each message and each language.
- SMS messages can only be sent for a specific group.
- Messages are limited to 70 characters and use 16-bit encoding.

---

## Supported Message Types

System messages related to subscription and unsubscription processes are supported for SMS sendout. The applicable messages depend on the group’s reply handling configuration.

| **Reply Handling Method** | **Email Message** | **SMS Message** |
| --- | --- | --- |
| Send Unsubscribe Instructions | `SysMsgUnsubscribeInstructions` | none |
| Treat as Mobile Subscribe Request | none | `SysMsgWelcomeToGroupPasswd` |
| Treat as Email Subscribe Request | none | `SysMsgWelcomeToGroupPasswd` |
| Add without Notification | Store email & mobile: none | `SysMsgMobileEmailSubscribeSuccess` |
| Store email only: none | none |
| Add with Notification | Store email & mobile: `SysMsgWelcomeToGroup` | `SysMsgWelcomeToGroupPasswd` AND `SysMsgMobileEmailSubscribeSuccess` |
| Store email only: `SysMsgWelcomeToGroup` | none |
| Invite | Store email & mobile: `SysMsgInviteToGroupPasswd` | `SysMsgInviteToGroupPasswd` AND `SysMsgMobileEmailSubscribeSuccess` |
| Store email only: `SysMsgInviteToGroupPasswd` | none |

## Related

- [SMS Message](/sms-messaging.md)
- [System Messages](/system-message.md)
- [Send a System Message via SMS](/send-a-system-message-via-sms.md)