---
schema_version: "1"
id: 9142a8012654dde079c86456206bb6ec10a3706fb64368290f3086e62e4459ad
title: Verify Email-Sending Domains to Create New Templates and Trialforce Source Orgs
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/264-0-0/rn_appexchange_trialforce_identify_domain_verification.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_appexchange_trialforce_identify_domain_verification.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 5d6e0cd5c56e3fb34725b59be3788104c3a5d4e5a21c8051ab37cc912959add4
description: Due to a Salesforce security enhancement for outbound email, you must verify the email-sending domains associated with your Trialforce branded email sets. Starting in Winter ’27, you must verify the email-sending domains in your Trialforce management org (TMO) to create a new associated Trialforce source org (TSO) for a branded email set. This requirement also applies to new templates generated from TSOs associated with your TMO in previous releases. If you’ve already set up a DomainKeys Identified Mail (DKIM) key or an authorized email domain, the associated email sets are automatically verified and you don’t need to take further action.
products:
  - Cross Cloud
release: "264"
---
# Verify Email-Sending Domains to Create New Templates and Trialforce Source Orgs

Due to a Salesforce security enhancement for outbound email, you must verify the email-sending domains associated with your Trialforce branded email sets. Starting in Winter ’27, you must verify the email-sending domains in your Trialforce management org (TMO) to create a new associated Trialforce source org (TSO) for a branded email set. This requirement also applies to new templates generated from TSOs associated with your TMO in previous releases. If you’ve already set up a DomainKeys Identified Mail (DKIM) key or an authorized email domain, the associated email sets are automatically verified and you don’t need to take further action.

![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-release-notes-salesforce_release_notes-264-0-0-production-enus/550ba85b-db1a-4608-9cd4-9a65ec96e1fa/images/icon_note.png)

Note If you need help identifying your TMO, contact Salesforce Customer Support.

**Where:** This change applies to Trialforce branded email sets in Salesforce Classic. Trialforce branded email sets are available in Developer Edition.

**When:** Starting July 18, 2026, you must have a verified email-sending domain in order to publish a new Trialforce branded email set. Starting in Winter ’27, you must verify the email-sending domains in your TMO to create a new associated TSO for a branded email set and to create new templates from TSOs associated with your TMO in previous releases. For existing templates, you must verify your email-sending domains before November 10, 2026 to continue using your custom branded email addresses instead of a substitute address, similar to orgId@sf-customer-mail.com.

**How:** From Setup in your TMO, use the Quick Find box to find and select **Branding**. Then, click **Email Sets**. In the list of published email sets, review the Verified Email Domain column. For any email sets that don’t have the Verified Email Domain column checked, verify the associated email-sending domain. You can verify the domain by either creating a DKIM key or setting up an authorized email domain.

#### See Also

- [_Salesforce Help_: Determine How to Verify Your Email-Sending Domains](https://help.salesforce.com/s/articleView?id=xcloud.security_user_email_verification_domain_auth.htm&language=en_US)
- [_ISVforce Guide_: Create Branded Emails](https://developer.salesforce.com/docs/atlas.en-us.packagingGuide.meta/packagingGuide/trialforce_creating_branded_emails.htm)
- [_Knowledge Article:_ Spring ’26 Email-Sending Domain Verification Requirement](https://help.salesforce.com/s/articleView?id=005316090&type=1&language=en_US)