title: Tuleap - project mail notification issue
body: <p>I have installed Tuleap and configured postfix mail setting in the server.</p>
  
  <p>We have configured 4-5 projects in the tool. For each and every project, I have turned on the send notification option in the Task tracker. Tuleap sends a alert mail based on that configuration.</p>
  
  <p>Everything was working fine ever since when the tool was installed, until last week, when I unchecked the send notification option for one of the projects and Tuleap kept sending alert mail for every status change in the artifact.</p>
  
  <p>I need to stop that behavior on a project to project basic, as I want notifications to be sent only for selected projects.</p>