social/mass_mailing_partner/views/res_partner_view.xml

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

<record model="ir.ui.view" id="view_partner_form">
    <field name="name">Partner Form with mailing contacts</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_form"/>
    <field name="arch" type="xml">
        <div class="oe_right oe_button_box" position="inside">
            <button name="%(mass_mailing.action_view_mass_mailing_contacts)d"
                    context="{'search_default_partner_id': active_id,
                              'default_partner_id': active_id}"
                    type="action"
                    class="oe_stat_button oe_inline"
                    icon="fa-envelope-o">
                <field name="mass_mailing_contacts_count"
                       widget="statinfo"
                       string="Mailing lists"/>
            </button>
        </div>
    </field>
</record>

<record id="view_res_partner_filter" model="ir.ui.view">
    <field name="name">Partner Search with mailing contacts</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_res_partner_filter"/>
    <field name="priority">20</field>
    <field name="arch" type="xml">
        <field name="category_id" position="after">
            <field name="mass_mailing_contacts" string="Mailing List"
                filter_domain="[('mass_mailing_contacts.list_id','ilike', self)]"/>
        </field>
    </field>
</record>

</data>
</openerp>