<?xml version="1.0"?>
<tree string="Mailing List Contacts" sample="1" multi_edit="1" js_class="mailing_contact_list">
                <header>
                    <button name="action_add_to_mailing_list" string="Add to List" type="object"/>
                </header>
                <field name="create_date" optional="show"/>
                <field name="title_id" optional="hide"/>
                <field name="name" readonly="1"/>
                <field name="company_name"/>
                <field name="email" readonly="1"/>
                <field name="is_blacklisted" string="Email Blacklisted"/>
                <field name="country_id" optional="hide"/>
                <field name="message_bounce" sum="Total Bounces" readonly="1"/>
                <field name="opt_out" invisible="'default_list_ids' not in context" readonly="1"/>
                <field name="list_ids" widget="many2many_tags" optional="hide"/>
            </tree>
        