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Suppression Lists

Suppression lists allow you to globally exclude specific user segments from receiving any campaign messages. They are segment-based, cross-channel, and enforced automatically across all campaigns and canvas flows.

How Suppression Lists Work​

Each suppression list references an existing segment. Any users who match that segment are automatically excluded from:

  • All campaign sends (email, SMS, push, webhook, WhatsApp, in-app)
  • Canvas message nodes

Suppression is applied at the targeting query level, meaning suppressed users are never even counted in the audience.

Creating a Suppression List​

  1. Navigate to Audience > Suppression Lists
  2. Click Create Suppression List
  3. Fill in:
    • Name: A descriptive name (e.g., "Unengaged Users", "Legal Hold")
    • Segment: Select the segment that defines which users to suppress
    • Exception Tags (optional): Tags that allow specific campaigns to bypass this list
  4. Click Create

The suppression list is active immediately.

Exception Tags​

Exception tags provide a way for specific campaigns to bypass a suppression list. This is useful for:

  • Transactional campaigns: Tag campaigns with transactional and add it as an exception tag
  • Legal notices: Tag compliance campaigns with legal to ensure they reach all users
  • Critical alerts: Security or safety notifications that must reach everyone

How it works​

  1. Add exception tags to a suppression list (e.g., transactional, legal)
  2. Tag your campaign with matching tags in the campaign's Audience tab
  3. When sending, if any of the campaign's tags match any of a suppression list's exception tags, that suppression list is bypassed for that campaign

Per-Campaign Exclude Segments​

In addition to global suppression lists, you can exclude specific segments on a per-campaign basis:

  1. In the campaign creation Audience tab, find the Exclude Segments section
  2. Select a segment to exclude
  3. Users in that segment will be excluded only from this specific campaign

This is useful for one-off exclusions that don't warrant a global suppression list.

Managing Suppression Lists​

Activating / Deactivating​

Toggle a suppression list between Active and Inactive status. Inactive lists are not enforced.

Previewing Impact​

Click the preview icon on any suppression list to see how many users are currently suppressed by it.

Deleting​

Deleting a suppression list removes the suppression immediately. Previously suppressed users will be eligible for future campaigns.

Campaign Tags​

Campaign tags serve two purposes:

  1. Organization: Label campaigns for filtering and reporting
  2. Suppression exceptions: Bypass specific suppression lists when a campaign's tags match the list's exception tags

Add tags in the campaign creation Audience tab under Campaign Tags.