magento-test/app/code/Magento/Newsletter/etc/adminhtml/system.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <section id="newsletter" translate="label" type="text" sortOrder="110" showInDefault="1" showInWebsite="1" showInStore="1">
            <label>Newsletter</label>
            <tab>customer</tab>
            <resource>Magento_Newsletter::newsletter</resource>
            <group id="general" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>General Options</label>
                <field id="active" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Enabled</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
            </group>
            <group id="subscription" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Subscription Options</label>
                <depends>
                    <field id="*/general/active">1</field>
                </depends>
                <field id="allow_guest_subscribe" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Allow Guest Subscription</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
                <field id="confirm" translate="label" type="select" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Need to Confirm</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
                <field id="confirm_email_identity" translate="label" type="select" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Confirmation Email Sender</label>
                    <source_model>Magento\Config\Model\Config\Source\Email\Identity</source_model>
                </field>
                <field id="confirm_email_template" translate="label comment" type="select" sortOrder="40" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Confirmation Email Template</label>
                    <comment>Email template chosen based on theme fallback when "Default" option is selected.</comment>
                    <source_model>Magento\Config\Model\Config\Source\Email\Template</source_model>
                </field>
                <field id="success_email_identity" translate="label" type="select" sortOrder="50" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Success Email Sender</label>
                    <source_model>Magento\Config\Model\Config\Source\Email\Identity</source_model>
                </field>
                <field id="success_email_template" translate="label comment" type="select" sortOrder="60" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Success Email Template</label>
                    <comment>Email template chosen based on theme fallback when "Default" option is selected.</comment>
                    <source_model>Magento\Config\Model\Config\Source\Email\Template</source_model>
                </field>
                <field id="un_email_identity" translate="label" type="select" sortOrder="70" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Unsubscription Email Sender</label>
                    <source_model>Magento\Config\Model\Config\Source\Email\Identity</source_model>
                </field>
                <field id="un_email_template" translate="label comment" type="select" sortOrder="80" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Unsubscription Email Template</label>
                    <comment>Email template chosen based on theme fallback when "Default" option is selected.</comment>
                    <source_model>Magento\Config\Model\Config\Source\Email\Template</source_model>
                </field>
            </group>
        </section>
    </system>
</config>