---
title: "System Blacklist: Create or Import"
slug: "system-blacklist-create-or-import"
description: "Reference for the System Blacklist Create and Import forms in Mapp Engage: list types (clear-text, MD5, SHA-256), entry fields, and import settings."
status: "update"
updated: 2026-10-30T13:39:59Z
published: 2026-10-30T13:39:59Z
canonical: "docs.mapp.com/system-blacklist-create-or-import"
---

> ## 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 Blacklist: Create or Import

## Overview

Use this interface to create or import system-level blacklists for email addresses, mobile numbers, or domains.

---

## Create a System Blacklist

### Navigation path

1. *Audience > Blacklists > System Blacklist*
2. Click **Create**.

---

### Settings

| **Setting** | Description |
| --- | --- |
| **List Type** | Choose “Clear-text”, “MD5”, or “SHA-256”. With MD5 or SHA-256, only the Email field is available. |
| **Email** | Enter one or more email addresses. For MD5 or SHA-256, enter the hash values instead. |
| **Mobile Number** | Enter one or more mobile numbers. |
| **Domain** | Enter one or more domains. |

---

### Actions

| **Action** | Description |
| --- | --- |
| **Create** | Opens the form to add entries to the system blacklist. |

---

## Import a System Blacklist

### Navigation path

1. *Audience > Blacklists > System Blacklist*
2. Click **Import**.

---

### Settings

| **Setting** | Description |
| --- | --- |
| **File** | Select the source file to import. |
| **File Type** | Select “Text”. |
| **List Type** | Choose “Clear-text”, “MD5”, or “SHA-256”. With MD5 or SHA-256, the file may contain hashed email addresses only. For SHA-256, see [Add SHA-256 Hashed Entries to a Blacklist](https://docs.mapp.com/docs/en/add-sha-256-hashed-entries-to-blacklist). |
| **Character Set** | Select the character encoding (for example, “UTF-8”). |
| **Import Mode** | Select how entries are handled during import (for example, “Add”). |

---

### Actions

| **Action** | Description |
| --- | --- |
| **Import** | Opens the import form to upload entries to the system blacklist. |