Try This...
<table border="0">
<tr>
<td><b>Your Email:</b></td>
<td><asp:TextBox runat="server" ID="UsersEmail" Columns="30"></asp:TextBox></td>
</tr>
<tr>
<td><b>Subject:</b></td>
<td><asp:TextBox runat="server" ID="Subject" Columns="30"></asp:TextBox></td>
</tr>
<tr>
<td colspan="2">
<b>Body:</b><br />
<asp:TextBox runat="server" ID="Body" TextMode="MultiLine" Columns="55" Rows="10"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Button runat="server" ID="SendEmail" Text="Send Feedback" />
</td>
</tr>
</table>
Obviously just substitute the details as necessary.
Please mark up if it helps