title: TFS @Mention not working
body: <p>HI we are using TFS Version 15.117.26714.0 </p>
  
  <p>The problem is whenever there is any mention  (@name) no email is generated against it while after writing @ the names popup but don't get emailed, while other emails are being sent through TFS eg whenever a new workitem is created etc.</p>
  
  <p>Any help/guidance is appreciated  </p>