Newsletter customer Magento_Newsletter::newsletter General Options Enabled Magento\Config\Model\Config\Source\Yesno Subscription Options Allow Guest Subscription Magento\Config\Model\Config\Source\Yesno Need to Confirm Magento\Config\Model\Config\Source\Yesno Confirmation Email Sender Magento\Config\Model\Config\Source\Email\Identity Confirmation Email Template Email template chosen based on theme fallback when "Default" option is selected. Magento\Config\Model\Config\Source\Email\Template Success Email Sender Magento\Config\Model\Config\Source\Email\Identity Success Email Template Email template chosen based on theme fallback when "Default" option is selected. Magento\Config\Model\Config\Source\Email\Template Unsubscription Email Sender Magento\Config\Model\Config\Source\Email\Identity Unsubscription Email Template Email template chosen based on theme fallback when "Default" option is selected. Magento\Config\Model\Config\Source\Email\Template