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

<template id="head" inherit_id="website.layout" name="Mail customization">
    <xpath expr="//head" position="inside">
        <script type="text/javascript" src="/mass_mailing/static/src/js/website_mass_mailing.editor.js" groups="base.group_website_publisher"></script>
        <script type="text/javascript" src="/mass_mailing/static/src/js/website_mass_mailing.js"></script>
    </xpath>
</template>

</data>
</openerp>

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

<template id="head" inherit_id="website.layout" name="Mail customization">
    <xpath expr="//head" position="inside">
        <script type="text/javascript" src="/mass_mailing/static/src/js/website_mass_mailing.editor.js" groups="base.group_website_publisher"></script>
    </xpath>
</template>

<template id="assets_frontend" inherit_id="website.assets_frontend" name="Mail Frontend Assets">
    <xpath expr="." position="inside">
        <script type="text/javascript" src="/mass_mailing/static/src/js/website_mass_mailing.js"></script>
    </xpath>
</template>

</data>
</openerp>

Move mass mailing website javascript in frontend bundle
Move mass mailing website javascript in frontend bundle
