social/mail_print/views/mail_message_report.xml

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

        <template id="mail_message">
            <t t-call="report.html_container">
                <t t-foreach="docs" t-as="o">
                    <t t-call="report.internal_layout">
                        <div class="page">
                            <style>
                                .space {padding-right: 0.3em;}
                            </style>
                            <table class="table-condensed">
                                <tr>
                                    <th>From:</th>
                                    <td><u><span t-field="o.email_from"/></u></td>
                                </tr>
                                <tr>
                                    <th>To:</th>
                                    <td t-foreach="o.partner_ids" t-as="p"><span t-field="p.name"/> <t t-if="p.email"> <u><span t-field="p.email"></span></u></t></td>
                                </tr>
                                <tr>
                                    <th>Subject:</th>
                                    <td><span t-field="o.subject"/></td>
                                </tr>
                                <tr>
                                    <th><span>Date:</span></th>
                                    <td><span t-field="o.date"/></td>
                                </tr>
                            </table>
                            <div style ="height: 1cm"> </div>
                            <table class="table-condensed">
                                <tr>
                                    <td><span t-field="o.body"/></td>
                                </tr>
                            </table>
                            <t t-if="o.attachment_ids" >
                                <div style ="height: 2cm"> </div>
                                <table class="table table-condensed">
                                    <tr>
                                        <th>Attachments</th>
                                    </tr>
                                    <tr t-foreach="o.attachment_ids" t-as="l">
                                        <td><span t-field="l.name"/></td>
                                        <td><span class="space" t-field="l.file_size"></span><span>Bytes</span></td>
                                    </tr>
                                </table>
                            </t>
                        </div>
                    </t>
                </t>
            </t>
        </template>

    </data>
</openerp>