title: How can I maintain conversations in MS Outlook using email headers?
body: <p>I have the following problem. My java code is sending emails using smtp mail server. This emails have to be grouped in some sort of threads (like conversations in Exchange). And this conversations have to be viewed properly (as conversations :-)) in MS Outlook. Is there some email headers that could be utilized. I've bumped into "In-reply-To" header, but it doesn't seem to do the trick in Outlook. Any suggestions?</p>
  
  <p>Thanks you in advance.</p>