---
schema_version: "1"
id: 945c6778ced66416a263faeb9dfb56d2467336d3132c65b3c98134ad22def89b
title: Auto-Suppression Lists
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_es_auto_suppresion_lists.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_es_auto_suppresion_lists.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: f72fefae815df68e6f4c751de5ce29c2ce91b556a0787f405a764b0f343c1dba
description: Assign a suppression list for use across an entire Marketing Cloud Engagement tenant or for specific business units for specific send classifications. You can assign auto-suppression lists at different levels of your account. Suppression lists filter out email addresses and prevent those addresses from receiving Email Studio messages. Suppression lists serve as a do-not-contact list for your email sends. Auto-suppression lists typically include addresses with a history of spam complaints, unsubscribe lists from previous providers or advertisers, addresses of your competitors, and canceled customers.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Auto-Suppression Lists

Assign a suppression list for use across an entire Marketing Cloud Engagement tenant or for specific business units for specific send classifications. You can assign auto-suppression lists at different levels of your account. Suppression lists filter out email addresses and prevent those addresses from receiving Email Studio messages. Suppression lists serve as a do-not-contact list for your email sends. Auto-suppression lists typically include addresses with a history of spam complaints, unsubscribe lists from previous providers or advertisers, addresses of your competitors, and canceled customers.

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

Note Enabling this feature republishes the suppression list changes for the triggered send. Triggered send content isn’t updated. Clear your triggered send queues before enabling. Subscribers in a triggered send queue when this feature is enabled aren’t auto-suppressed. The auto-suppression isn’t applied to the send already in the queue.

Fields on auto-suppression lists are similar to attributes on a regular list. However, you can't use fields for personalization or segmenting. Fields on suppression lists serve as informational data for you and other users of Marketing Cloud. When you create an auto-suppression list, the system generates default fields.

- Email Address
- Date Added

Add as many fields as necessary.

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

Note Auto-Suppression lists created in a child Business Unit impacts only the child BU. Auto-Suppression lists created in an Enterprise BU impacts the whole account.

- **[Create an Auto-Suppression List](https://help.salesforce.com/s/articleView?id=mktg.mc_es_create_auto_suppression_list.htm&release=264.0.0&type=5)**  
    To automatically prevent sends to selected contacts, create an auto-suppression list in Email Studio.
- **[Edit an Auto-Suppression List](https://help.salesforce.com/s/articleView?id=mktg.mc_es_edit_auto_suppression_list.htm&release=264.0.0&type=5)**  
    Edit an existing auto-suppression list in Email Studio to change any applicable properties and update the associated triggered sends. Enabling this feature republishes the suppression list changes for the triggered send. Triggered send content isn’t updated. Clear your triggered send queues before enabling. Subscribers in a triggered send queue when this feature is enabled aren’t auto-suppressed. The auto-suppression isn’t applied to the send already in the queue.
- **[Add Subscribers to an Auto-Suppression List](https://help.salesforce.com/s/articleView?id=mktg.mc_es_add_subscribers_to_auto_suppression_list.htm&release=264.0.0&type=5)**  
    To prevent extra subscribers from receiving triggered sends, add them to an auto-suppression list in Email Studio.
- **[Turn Off Auto-Suppression Lists for an Account](https://help.salesforce.com/s/articleView?id=mktg.mc_es_turn_off_auto_suppression_lists.htm&release=264.0.0&type=5)**  
    To include all subscribers in triggered sends, you can turn off auto-suppression lists in Marketing Cloud Engagement.