title: There is no option E-mail in SSRS data-driven subscription
body: <p>I want to create data-driven subscription for my SSRS report.</p>
  
  <p>I need to send reports by e-mail for users. But there is no option E-mail in "Specify how recipients are notified". Screenshot attached.</p>
  
  <p>Why E-mail option doesn't exist here?</p>
  
  <p>P.S.Using SSRS 2012, OS Windows 8.</p>
  
  <p><img src="https://i.stack.imgur.com/rioEt.png" alt="enter image description here"></p>