title: jQuery ajax success error
body: <p>I'm trying to submit a form witch sends an email:</p>
  
  <p><strong>JS</strong></p>
  
  <pre><code>var that = $(this);
  $.ajax({
    url: '../wp-content/themes/bsj/php/validate.php',
    type: 'post',
    context: that,
    data: $('#sign-up').serialize(),
    cache: false,
    success: function(){ 
      alert('success!');
    },
    error: function(){
      alert('error!');
    }
  });
  </code></pre>
  
  <p><strong>PHP</strong></p>
  
  <p>
  
  <pre><code>/*----------------------------------
      Variables
  ----------------------------------*/
  
      // Personal info
      $prefix = $_POST['prefix'];
      $first_name = $_POST['first_name'];
      $last_name = $_POST['last_name'];
      $company = $_POST['company'];
      $email = $_POST['email'];
      $title = $_POST['title'];
      $dept = $_POST['dept'];
  
      // Contact details
      $address = $_POST['address'];
      $address2 = $_POST['address2'];
      $city = $_POST['city'];
      $state = $_POST['state'];
      $zip = $_POST['zip'];
      $phone = $_POST['phone'];
      $ext = $_POST['ext'];
      $fax = $_POST['fax'];
  
      // Job Summary
      $job_title = $_POST['job_title'];
      $positions = $_POST['positions'];
      $hours = $_POST['hours'];
      $age = $_POST['age'];
      $wage = $_POST['wage'];
      $wage_type = $_POST['wage_type'];
      $job_description = $_POST['job_description'];
      $comments = $_POST['comments'];
  
  
  /*----------------------------------
      Mail Form
  ----------------------------------*/
  
      $to      = 'email@email.com';
      $subject = 'Subject';
      $headers = 'From: noreply@email.com' . "\r\n" .
          'Reply-To: noreply@email.com' . "\r\n" .
          'X-Mailer: PHP/' . phpversion();
  
      $message = 
          '### Personal Information ###' . "\r\n\r\n" .
          'Prefix: ' . $prefix . "\r\n" .
          'First Name: '. $first_name . "\r\n" .
          'Last Name: ' . $last_name . "\r\n" .
          'Company: ' . $company . "\r\n" .
          'E-Mail: ' . $email . "\r\n" .
          'Title: ' . $title . "\r\n" .
          'Dept.: ' . $dept . "\r\n\r\n";
  
      $message .= 
          '### Contact Details ###' . "\r\n\r\n" .
          'Address: ' . $address . "\r\n" .
          'Address 2: ' . $address2 . "\r\n" .
          'City: ' . $city . "\r\n" .
          'State: ' . $state . "\r\n" .
          'Phone: ' . $phone . "\r\n" .
          'Ext.: ' . $ext . "\r\n" .
          'Fax: ' . $fax . "\r\n\r\n";
  
      $message .= 
          '### Job Description ###' . "\r\n\r\n" .
          'Job Title: ' . $job_title . "\r\n" .
          'Positions: ' . $positions . "\r\n" .
          'Hours: ' . $hours . "\r\n" .
          'Age: ' . $age . "\r\n" .
          'Wage: ' . $wage . ' - ' . $wage_type .  "\r\n" .
          'Job Description: ' . $job_description . "\r\n" .
          'Comments: ' . $comments;
  
      mail($to, $subject, $message, $headers);
  </code></pre>
  
  <p>I'm setting <code>that</code> because I'm using a modal window plugin to display the form, this way I get the right scope. </p>
  
  <p>The main problem is that when I click submit the email gets in my inbox just fine but it always executes the error function and not the success one.</p>
  
  <p>This is driving me nuts, I looked EVERYWHERE for answers with no luck.</p>
  
  <p>I got the success callback a couple times but now it doesn't work anymore and I don't know why. I'm getting the email just fine...</p>
  
  <p>I checked the response headers with Chrome Developer tools and I get <code>200 OK</code> so it's getting back. What is the problem?</p>
  
  <p><strong>EDIT:</strong> Well, I give up for today after 5 hours trying. I might come back tomorrow and try other things. I'll just use <code>complete</code> for now, which works fine. I'm thinking it could be related to the server. The client is using IIS...</p>