title: Why do I get 'service unavailable' with multiple chat sends when using XMPP?
body: <p>I have made a simple IM client in both Python and C#, using a few different XMPP libraries for each.</p>
  
  <p>They work very well as simple autoresponders, or trivial bots, but when I turn them into chat rooms (ie, a message gets reflected to many other JIDs), I suddenly start getting 503 service-unavailable responses from the Google talk server.</p>
  
  <p>Where should I start looking to resolve this issue? Given that I have used several languages and libraries, I don't think this is a problem with my particular setup. I am using the various examples provided with the libraries.</p>