Hi create a form that sends the info to this code, that should do it
$sql = "select $email from $your_database";
$res = mysql_query($sql) or die("Couldn't get addresses.");
$headers = "From: $yor_name<$your_email>\n";
//ADD MORE HEADERS HERE HTML ETC...
while ($row = mysql_fetch_array($res)) {
$email_addr = $row[0];
$fullmessage = $_POST[message];
mail("$email_addr", "$_POST[subject]", $fullmessage, $headers);