social/mail_outbound_static/views/ir_mail_server_view.xml

<?xml version="1.0" encoding="utf-8"?>

<!--
    Copyright 2017 LasLabs Inc.
    License LGPL-3 or later (http://www.gnu.org/licenses/lgpl.html).
-->

<odoo>

    <record id="ir_mail_server_form" model="ir.ui.view">
        <field name="name">IR Mail Server - From Address</field>
        <field name="model">ir.mail_server</field>
        <field name="inherit_id" ref="base.ir_mail_server_form" />
        <field name="arch" type="xml">
            <xpath expr="//field[@name='smtp_pass']" position="after">
                <field name="smtp_from" />
            </xpath>
        </field>
    </record>

</odoo>