odoo16/addons/maintenance/data/mail_alias_data.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
<data noupdate="1">
    <!-- email alias for maintenance requests -->
    <record id="mail_alias_equipment" model="mail.alias">
        <field name="alias_name">helpdesk</field>
        <field name="alias_model_id" ref="model_maintenance_request"/>
        <field name="alias_user_id" ref="base.user_admin"/>
    </record>
</data>
</odoo>