Enable the Export Email Allowlist

Limit the sites that can receive your email data by enabling the email export allowlist in Marketing Cloud Engagement.

1. From Setup, in the Quick Find box, enter security, and then select Security Settings.
2. Click Edit.
3. Select Enforce Export Email Allowlist.
   

   Note For Enterprise 2.0 accounts, use the Export Email Allowlist List Source menu to specify whether to define the allowlist at the enterprise level or the business unit level.
4. Save your changes.