title: getting lots of spam from "unknown" and helo localhost
body: <p>On our server, we keep receiving spam with the following headers. We are using whm 11.44 and exim.</p>
  
  <p>Return path is always:
  Return-path: &lt;></p>
  
  <p>and it says Received: from unknown (HELO localhost)</p>
  
  <p>Both which raise flags. We're just not sure exactly how to stop/reject them.</p>
  
  <pre><code>From - Mon Feb 16 14:27:02 2015
  X-Account-Key: account3
  X-UIDL: UID10475-1296887657
  X-Mozilla-Status: 0001
  X-Mozilla-Status2: 00000000
  X-Mozilla-Keys:                                                                                 
  Return-path: &lt;&gt;
  Envelope-to: me@myserver.com
  Delivery-date: Mon, 16 Feb 2015 09:13:38 -0600
  Received: from [122.160.73.62] (port=10732 helo=122.160.73.62)
  by myserver.myserver.com with smtp (Exim 4.82)
  id 1YNN0Z-00056c-7P
  for me@myserver.com; Mon, 16 Feb 2015 08:50:47 -0600
  Received: from unknown (HELO localhost) (intlimd@highgrove.net@214.92.72.48)
  by 122.160.73.62 with ESMTPA; Mon, 16 Feb 2015 20:23:11 +0530
  From: intlimd@highgrove.net
  To: myemail@myserver.com
  Subject: Do not disapoint your girl this night
  
  http://mandatory.natur.com/ Real magic in your life
  </code></pre>