Marketing Cloud Engagement (MCE) User Domain Retirement

Salesforce is ending support for User Domains in Marketing Cloud Engagement.

This pertains to organizations that use the Marketing Cloud Engagement (MCE) User Domains feature, specifically the From Address Management feature that allows you to verify From Addresses using Verification Emails whose domain does not match one of your Verified Domains. (see Verified Domain list below)

What does this change mean for me? 

If your organization has created one or more User Domains since February 1, 2026 that do not contain a verified domain for your account, starting October 4, 2026 you will no longer have access to this feature. See the Verified Domain list below.

What action can I take? 

In order to create new From Addresses, the domain that you use must be a Verified Domain that you have created in your account using one of the methods below:  

Marketing Cloud Verified Domain options:

• Sender Authentication Package (SAP) - Provisioned to your account in 2–5 days. Contact your Salesforce account team to initiate. See Working with the Email Sender Authentication Package User.

• Private Domain — Provisioned to your account in 2–5 days. Contact your Salesforce account team to initiate. See Configure a Sender Authentication Package or Private Domain.

• Registered Domain — Self-service setup, typically completed in approximately 1 day. See Register a Domain in Marketing Cloud Engagement.

No action is needed for From Addresses that have already been created.

What happens if I don’t take action?

After October 4th, 2026 your account will no longer send verification emails if you enter a From Address that contains a domain that has not been verified. Instead you will receive an error message that a From Address must contain a verified domain.

How do I get more information?
If you have any questions or need assistance, refer to Salesforce Help or contact your Salesforce account team. 

For more information about Salesforce’s approach to retiring products and features, read our Product & Feature Retirement Philosophy.