php mail form

This is my very simple start to a mailing list, when I run this code I get this error.
No recipient addresses found in header

I don't wish this mailing list to be all fancy, just work.


Thanks.



$sql = "SELECT * FROM emaillist
";

$result = @mysql_query($sql,$conn) or die("Couldn't execute query.");
if (mysql_num_rows($result) < 0) {
echo "No Addresses to display";
}

$rows = @mysql_num_rows($result) or die("Error");

$i = 0;

while ($i < $rows){

$to="$address";
if (mail($to,$subject,$message))
echo "Message Sent.";
else
echo "Failed to send message.";

$i++;
}