Why not make your form put the selected items in an array, and then you loop through the array and put all the items in thie own rows... would make it a lot easier:
<tr>
<td colspan="2"><h4>Product Interest:</h4></td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Ultrasonic Spray Fluxing" type="checkbox">
Ultrasonic Spray Fluxing</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Medical Coatings" type="checkbox">
Medical Coatings</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="General Ultrasonic Atomization" type="checkbox">
General Ultrasonic Atomization</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Glass Coatings" type="checkbox">
Glass Coatings</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Web Coatings" type="checkbox">
Web Coatings</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Ultrasonic Spray Dryer" type="checkbox">
Ultrasonic Spray Dryer</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Photo Resist Coating" type="checkbox">
Photo Resist Coating</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Solder Recovery" type="checkbox">
Solder Recovery</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="XYZ Spraying" type="checkbox">
XYZ Spraying</td>
</tr>
<tr>
<td colspan="2"><input name="prodint[]" value="Vacuum Deposition" type="checkbox">
Vacuum Deposition</td>
<?php
foreach($prodint as $prod)
{
echo '<tr><td>'.$prod.'</td></tr>';
}
?>
Done!! Now, you'll only get the items that are selected in the emails, and shouldn't get any more.
~Brett