social/mass_mailing_custom_unsubscribe/data/mail_unsubscription_reason.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- © 2016 Jairo Llopis <jairo.llopis@tecnativa.com>
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->

<openerp>
<data noupdate="1">

    <record id="reason_not_interested"
            model="mail.unsubscription.reason"
            forcecreate="False">
        <field name="name">I'm not interested</field>
        <field name="sequence">10</field>
        <field name="details_required" eval="False"/>
    </record>

    <record id="reason_not_requested"
            model="mail.unsubscription.reason"
            forcecreate="False">
        <field name="name">I did not request this</field>
        <field name="sequence">20</field>
        <field name="details_required" eval="False"/>
    </record>

    <record id="reason_too_many"
            model="mail.unsubscription.reason"
            forcecreate="False">
        <field name="name">I get too many emails</field>
        <field name="sequence">30</field>
        <field name="details_required" eval="False"/>
    </record>

    <record id="reason_other"
            model="mail.unsubscription.reason"
            forcecreate="False">
        <field name="name">Other reason</field>
        <field name="sequence">100</field>
        <field name="details_required" eval="True"/>
    </record>

</data>
</openerp>