Title should say it all me thinks.
Form code:
<form name="contactform" method="post" action="formsend.php">
<table width="450px">
</tr>
<tr>
<td valign="top">
<label for="first_name">First Name *</label>
</td>
<td valign="top">
<input type="text" name="first_name" maxlength="50"...