---
schema_version: "1"
id: 34177ff64ce8a4315051dcc5c1c531c1e1d3e8b0383ffa086cf51ccdf0c5c814
title: Exclusion Lists in Marketing Cloud Engagement
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_es_exclusion_list.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_es_exclusion_list.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: ec37be038fb4e9de909e0669f71a4185fc6a4b5823c36816270c1affacf08d5d
description: An exclusion list is any list, group, or data extension you create in the application that at the time of send you select to exclude from the send. If your Email Studio account has subscriber key enabled, the system excludes using the subscriber key value. If your account does not have subscriber key enabled, the system excludes using email address.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Exclusion Lists in Marketing Cloud Engagement

An exclusion list is any list, group, or data extension you create in the application that at the time of send you select to exclude from the send. If your Email Studio account has subscriber key enabled, the system excludes using the subscriber key value. If your account does not have subscriber key enabled, the system excludes using email address.

![Example](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-mc_email-264-0-0-production-enus/a0b807ef-dfbb-412c-b26e-310d91f2d6df/images/icon_example.png)

Example A common case for exclusion lists is as follows: You send a newsletter to List A but later realize you want to send it to List B. Some of the subscribers on List A also exist on List B and you don't want to send them the same email twice. When you send to List B, you select List A as an exclusion list.

#### See Also

- [Lists with Enhanced Subscriber Features](https://help.salesforce.com/s/articleView?id=mktg.mc_es_lists_enhanced_subscriber.htm&release=264.0.0&type=5 "Learn about enhanced subscriber lists in Email Studio for Marketing Cloud Engagement.")