Mandatory Sending-Email Domain Verification Timeline

The requirement to verify email-sending domains rolls out in a staggered approach shortly after your org gets Spring ’26, patch 11. Salesforce is making every effort to start with orgs with the least volume and variability of email-sending domains. 

Allowlist Generation: In late February 2026, Salesforce generated a temporary allowlist of email-sending domains for existing orgs. See Determine Your Temporarily Allowlisted Email-Sending Domains.

Spring ’26, Patch 11 Deployment

Salesforce started deploying this patch:

• In sandboxes: March 24, 2026

• In all other orgs, including production:  March 26, 2026

To get the patch version for your org, go to Trust Status, search for your My Domain name or instance, and then click the maintenance tab. 

Phase 1: New Email-Sending Domains and Existing Domains 

Salesforce only sends emails from verified or allowlisted domains. Verification is required for:

• Email-sending domains added after February 25, 2026, regardless of whether you add the domain to a new or existing org.

• Email-sending domains that aren’t allowlisted

Deployment Dates

See Check the Verification Status of Your Email-Sending Domains in Salesforce Help.

Phase 2: Enforcement for Allowlisted Domains

When this change is deployed in your org, the allowlisted domains must be verified.  Salesforce can send email only when the email address uses a verified domain. 

Deployment Dates