server-tools/fetchmail_attach_from_folder/views/fetchmail_server.xml

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

    <record model="ir.ui.view" id="view_email_server_form">
        <field name="name">fetchmail.server.form</field>
        <field name="model">fetchmail.server</field>
        <field name="inherit_id" ref="fetchmail.view_email_server_form" />
        <field name="arch" type="xml">
            <field name="object_id" position="attributes">
                <attribute
                    name="attrs">{'required': [('type', '!=', 'imap')]}</attribute>
            </field>
            <field name="type" position="after">
                <field name="folders_only" />
            </field>
            <xpath
                expr="//notebook"
                position="inside">
                <page
                    string="Folders to monitor"
                    attrs="{'invisible': [('type','!=','imap')]}">
                    <group>
                        <field
                            name="folder_ids"
                            nolabel="1">
                            <tree colors="gray:active==False">
                                <field name="active" invisible="True" />
                                <field name="sequence" widget="handle" />
                                <field name="path" />
                                <field name="model_id" />
                                <field name="model_field" />
                                <field name="match_algorithm" />
                                <field name="mail_field" />
                            </tree>
                            <form>
                                <field name="state" invisible="1" />
                                <header>
                                    <button
                                        type="object"
                                        name="button_confirm_folder"
                                        string="Test &amp; Confirm"
                                        states="draft"/>
                                    <button
                                        type="object"
                                        name="button_attach_mail_manually"
                                        string="Attach mail manually"
                                        states="done"/>
                                </header>
                                <group>
                                    <group>
                                        <field
                                            name="path"
                                            placeholder="INBOX.subfolder1" />
                                        <field name="model_id" />
                                        <field
                                            name="model_field"
                                            placeholder="email" />
                                        <field name="match_algorithm" />
                                        <field
                                            name="mail_field"
                                            placeholder="to,from" />
                                    </group>
                                    <group>
                                        <field name="active" />
                                        <field name="delete_matching" />
                                        <field name="flag_nonmatching" />
                                        <field name="match_first" />
                                        <field name="msg_state" />
                                        <field
                                            name="model_order"
                                            attrs="{'readonly': [('match_first','==',False)], 'required': [('match_first','==',True)]}"
                                            placeholder="name asc,type desc" />
                                        <field
                                            name="domain"
                                            placeholder="[('state', '=', 'open')]" />
                                    </group>
                                </group>
                            </form>
                        </field>
                    </group>
                </page>
            </xpath>
        </field>
    </record>

</odoo>