Salesforce Case Auto-Response Emails Not Sending When From Address Matches Automated Process User

Salesforce requires that you use a verified email address to continue sending emails through Salesforce. When the 'From' email address, in Case Auto-Response Rule, is a verified Organization-Wide Email Address (OWEA) that matches with the Automated Process user email address (not verified) in Salesforce, the email isn’t triggered. Here, the 'From' email address is resolved to the Automated Process user and hence the email is not generated as it fails the verified email checks.

By default, no email address is set for the Automated Process User. Automated Process User can end up with an email address when specifying 'System' as an 'Automated Case User' under Case Support Settings.

In such situations, Salesforce Admins can set the email address for the Automated Process User. Specify an organization-wide email address for the Salesforce admin profile under Process Automation Settings in Setup:

1.  From Setup, enter Process Automation Settings in the Quick Find box, then select Process Automation Settings.
2.  For Automated Process User Email Address, specify the organization-wide address.
3.  Save your changes.