magento-test/app/code/Magento/Email/etc/config.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_Store:etc/config.xsd">
    <default>
        <design>
            <email>
                <header_template>design_email_header_template</header_template>
                <footer_template>design_email_footer_template</footer_template>
            </email>
        </design>
        <system>
            <media_storage_configuration>
                <allowed_resources>
                    <email_folder>email</email_folder>
                </allowed_resources>
            </media_storage_configuration>
            <emails>
                <forgot_email_template>system_emails_forgot_email_template</forgot_email_template>
                <forgot_email_identity>general</forgot_email_identity>
            </emails>
            <smtp>
                <disable>0</disable>
                <host>localhost</host>
                <port>25</port>
                <set_return_path>0</set_return_path>
            </smtp>
        </system>
        <trans_email>
            <ident_custom1>
                <email>custom1@example.com</email>
                <name>Custom 1</name>
            </ident_custom1>
            <ident_custom2>
                <email>custom2@example.com</email>
                <name>Custom 2</name>
            </ident_custom2>
            <ident_general>
                <email>owner@example.com</email>
                <name>Owner</name>
            </ident_general>
            <ident_sales>
                <email>sales@example.com</email>
                <name>Sales</name>
            </ident_sales>
            <ident_support>
                <email>support@example.com</email>
                <name>CustomerSupport</name>
            </ident_support>
        </trans_email>
    </default>
</config>