title: How can I use CONDSTORE in dovecot
body: <p>I'm devoloping a webmail! 
  There is a problem.When dovecot receives a new mail how can I trigger my customer program.
  I have found the notify plugin of dovecot in url '<a href="http://wiki2.dovecot.org/Plugins" rel="nofollow noreferrer">http://wiki2.dovecot.org/Plugins</a>' However it does not tell me how to use that
  I also find the same problem in url  <a href="https://stackoverflow.com/questions/21981316/">Listening to folder create, delete, renamed and mail flagged events in imap server?</a> 
  it tells that use CONDSTORE. 
  But how to use CONDSTORE command !</p>