title: Delete Queue from bearerbox memory
body: <p>Today I faced a very strange issue.  I sent messages 10 days before and on that time <code>smpp</code> were in re-connecting mode. Today when <code>smpp</code> came online then messages are getting delivered. This shouldn't happen. Is there any parameter in <code>cannel</code> which can expire the message after a particular period of time.</p>
  
  <p>I already used <code>validityperiod</code> parameter but it's not working for my case.</p>