Index: app/views/layouts/mailer.html.erb
===================================================================
--- app/views/layouts/mailer.html.erb	(revision 14479)
+++ app/views/layouts/mailer.html.erb	(working copy)
@@ -47,6 +47,18 @@
 </style>
 </head>
 <body>
+
+<!--[if gte mso 9]>
+<table cellpadding="0" cellspacing="0" border="0" id="backgroundTable" align="center" style="background: #fff;">
+	<tr>
+		<td>
+
+		<table cellpadding="0" cellspacing="0" border="0" align="center">
+			<tr>
+				<td>
+
+<![endif]-->
+
 <div id="content">
 <% if Setting.emails_header.present? -%>
 <span class="header"><%= Redmine::WikiFormatting.to_html(Setting.text_formatting, Setting.emails_header).html_safe %></span>
@@ -57,5 +69,16 @@
 <span class="footer"><%= Redmine::WikiFormatting.to_html(Setting.text_formatting, Setting.emails_footer).html_safe %></span>
 <% end -%>
 </div>
+
+<!--[if gte mso 9]>
+				</td>
+			</tr>
+		</table>
+
+		</td>
+	</tr>
+</table>
+<![endif]-->
+
 </body>
 </html>
