Notification recipients cannot be changed via email_action.recipient_usersDescriptionThere are recipients set in the notification "Who will receive" tab The instance has an email script trying to change the recipient list using email_action object with a script similar to next one: (function runMailScript(current, template, email, email_action, event) { var user = new GlideRecord('sys_user'); user.addEncodedQuery('user_name=' + current.sys_created_by); user.query(); while (user.next()){ email.addAddress("to", user.email,user.name); template.print(user.name); email_action.recipient_users += user.sys_id+","; } })(current, template, email, email_action, event); The notification preview shows that apparently the recipients was properly set as the code above logicRelease or EnvironmentAllCauseEmailOutbound object's addAddress() method, "to" recipients cannot be modified, as per the docs it supports "cc" and "bcc" only. Using "email_action" - GlideRecord object for the email notification, it is not possible to change the recipients in the email as it is not the EmailOutbound object(actual email) For more information, please refer to our documentation: Mail script APIResolutionUse an event based notification The option "Event parm 1 contains recipient " is available for event based notifications Pass the recipient in parm1 while creating event from the script/business rule. For more information about how to create a notification, follow our documentation page Create A Notification