title: Woocommerce: Adding second email address not working, unless recipient is admin
body: <p>I have tried several methods to add additional recipients to Woocommerce emails, but it only seems to work on test orders where the primary recipient is the admin.</p>
  
  <p>These are the snippets I've tried. If the customer for the order is the admin, the email is sent both addresses. If the order contains a customer email address, it is only send to that email address and not the CC. </p>
  
  <p>Here are the code snippets I've tried:</p>
  
  <pre><code>add_filter( 'woocommerce_email_recipient_customer_processing_order', 'my_email_recipient_filter_function', 10, 2);
  
  function my_email_recipient_filter_function( $recipient ) {
  $recipient = $recipient   . ', secondemail@example.com';
  return $recipient;
  }
  </code></pre>
  
  <p>.</p>
  
  <pre><code>add_filter( 'woocommerce_email_headers', 'woocommerce_email_cc_copy', 10, 2);
  
  function woocommerce_email_cc_copy( $headers, $email ) {
  if ( $email == 'customer_processing_order') {
      $headers .= 'CC: Your name &lt;secondemail@example.com&gt;' . "\r\n"; //just repeat this line again to insert another email address in BCC
  }
  
  return $headers;
  }
  </code></pre>
  
  <p>.</p>
  
  <p>This one works, but fires with every single email notification:</p>
  
  <pre><code>add_filter( 'woocommerce_email_headers', 'mycustom_headers_filter_function', 10, 2);
  
  function mycustom_headers_filter_function( $headers, $object ) {
          $headers .= 'CC: My name &lt;secondemail@example.com&gt;' . "\r\n";
  
      return $headers;
  }
  </code></pre>
  
  <p>If I add the email <code>$object</code> in, so it only fires for customer processing orders, it only cc's on the admin emails (cc only, not recipient), not customers (neither cc nor recipient).</p>
  
  <pre><code>add_filter( 'woocommerce_email_headers', 'mycustom_headers_filter_function', 10, 2);
  
  function mycustom_headers_filter_function( $headers, $object ) {
   if ( $object == 'customer_processing_order') {
          $headers .= 'CC: My name &lt;secondemail@example.com&gt;' . "\r\n";
   }
  
      return $headers;
  }
  </code></pre>
  
  <p>I would appreciate any advice.</p>