Email to a Friend catalog Magento_Config::sendfriend Email Templates Enabled Magento\Config\Model\Config\Source\Yesno Select Email Template Email template chosen based on theme fallback when "Default" option is selected. Magento\Config\Model\Config\Source\Email\Template Allow for Guests Magento\Config\Model\Config\Source\Yesno Max Recipients validate-digits Max Products Sent in 1 Hour validate-digits Limit Sending By Magento\SendFriend\Model\Source\Checktype