php mail quit working

[garyb10]

Hi All, I have been using this mail script for about 6 month. Every thing worked fine(except for sticking from after the body) until this week. Now it doesn't work and no errors. Maybe I have been looking at it too long, but I can't find anything wrong. Can anyone spot whats wrong?

 

$to      = "[email protected]";
$subject = $_REQUEST["subject"];
$body = $_REQUEST["body"];
$email = $_REQUEST["email"];
$name = $_REQUEST["name"];

$dodgy_strings = array(
                "content-type:"
                ,"mime-version:"
                ,"multipart/mixed"
                ,"bcc:"
);

function is_valid_email($email) {
  return preg_match('#^[a-z0-9.!\#$%&\'*+-/=?^_`{|}~]+@([0-9.]+|([^\s]+\.+[a-z]{2,6}))$#si', $email);
}

function contains_bad_str($str_to_test) {
  $bad_strings = array(
                "content-type:"
                ,"mime-version:"
                ,"multipart/mixed"
      ,"Content-Transfer-Encoding:"
                ,"bcc:"
      ,"cc:"
      ,"to:"
  );

  foreach($bad_strings as $bad_string) {
    if(eregi($bad_string, strtolower($str_to_test))) {
      echo "$bad_string found. Suspected injection attempt - mail not being sent.";
      exit;
    }
  }
}

function contains_newlines($str_to_test) {
   if(preg_match("/(%0A|%0D|\\n+|\\r+)/i", $str_to_test) != 0) {
     echo "newline found in $str_to_test. Suspected injection attempt - mail not being sent.";
     exit;
   }
}

if($_SERVER['REQUEST_METHOD'] != "POST"){
   echo("Unauthorized attempt to access page.");
   exit;
}

if (!is_valid_email($email)) {
  echo 'Invalid email submitted - mail not being sent.';
  exit;
}

contains_bad_str($email);
contains_bad_str($subject);
contains_bad_str($body);//replace body with $body

contains_newlines($email);
contains_newlines($subject);

$body = $body . " From: " . $name;
$headers='MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html;charset=iso-8859-1' . "\r\n";
$headers .= "From: $email" . "\r\n";
mail ($to, $subject, $body, $headers);
echo "Thanks for submitting.";