Comment obtenir des coins arrondis dans les e-mails Outlook sans images ?

<code class="html"><div>
    <!--[if mso]>
    <v:roundrect xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word" href="http://www.EXAMPLE.com/" style="height:40px;v-text-anchor:middle;width:300px;" arcsize="10%" stroke="f" fillcolor="#d62828">
        <w:anchorlock/>
        <center style="color:#ffffff;font-family:sans-serif;font-size:16px;font-weight:bold;">
            Button Text Here!
        </center>
    </v:roundrect>
    <![endif]-->
    <!--[if !mso]> -->
    <table cellspacing="0" cellpadding="0">
        <tr>
            <td align="center" width="300" height="40" bgcolor="#d62828" style="-webkit-border-radius: 5px; -moz-border-radius: 5px; border-radius: 5px; color: #ffffff; display: block;">
                <a href="http://www.EXAMPLE.com/" style="color: #ffffff; font-size:16px; font-weight: bold; font-family:sans-serif; text-decoration: none; line-height:40px; width:100%; display:inline-block">
                    Button Text Here!
                </a>
            </td>
        </tr>
    </table>
    <!-- <![endif]-->
</div></code>