partner-contact/partner_email_check/views/base_config_view.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="view_general_configuration" model="ir.ui.view">
        <field name="name">partner_email_check</field>
        <field name="model">res.config.settings</field>
        <field name="inherit_id"
               ref="base_setup.res_config_settings_view_form" />
        <field name="arch" type="xml">
            <xpath expr="//div[@name='multi_company']" position='after'>
                <h2>Email validation</h2>
                <div class="row mt16 o_settings_container"
                     name="partner_email_check">
                    <div class="col-xs-12 col-md-6 o_setting_box">
                        <div class="o_setting_left_pane">
                            <field name="partner_email_check_filter_duplicates" />
                        </div>
                        <div class="o_setting_right_pane">
                            <label for="partner_email_check_filter_duplicates" />
                            <div class="text-muted">
                                Require partner email addresses to be unique
                            </div>
                        </div>
                    </div>
                    <div class="col-xs-12 col-md-6 o_setting_box">
                        <div class="o_setting_left_pane">
                            <field name="partner_email_check_check_deliverability" />
                        </div>
                        <div class="o_setting_right_pane">
                            <label for="partner_email_check_check_deliverability" />
                            <div class="text-muted">
                                Ensure that partner email addresses can be delivered to
                            </div>
                        </div>
                    </div>
                </div>
            </xpath>
        </field>
    </record>
</odoo>