server-tools/mail_cleanup/mail_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record model="ir.ui.view" id="inherit_fetchmail_cleanup">
            <!-- must be unique in this module. -->
            <field name="name">inherit_fetchmail_for cleanup</field>
            <field name="model">fetchmail.server</field>
            <!--parent python entity -->
            <field name="inherit_id" ref="mail_environment.inherit_fetchmail"/>
            <!-- modulename.view -->
            <field name="arch" type="xml">
                <field name="is_ssl" position="after">
                    <field name="cleanup_days"/>
                    <field name="purge_days"/>
                </field>
                <field name="password" position="after">
                    <field name="cleanup_folder"/>
                </field>
            </field>
        </record>
    </data>
</openerp>