title: Error on Email sending workflow email on Sharepoint 2013 SP1
body: <p>Environment:</p>
  
  <ul>
  <li><p>Sharepoint 2013 SP1 (Standalone) on WS2008R2</p></li>
  <li><p>Workflow Manager 1.0</p></li>
  <li><p>Active Directory on WS2008R2 and Exchange Server 2010 on WS2008R2</p></li>
  </ul>
  
  <p>Steps:</p>
  
  <ol>
  <li><p>Install Sharepoint 2013 (Non-SP1) and configure to send e-mail</p></li>
  <li><p>Set Workflow Manager with HTTP connection</p></li>
  <li><p>Open Sharepoint Designer, choose Sharepoint 2013 Workflow, add "send e-mail" action</p></li>
  <li><p>Run Workflow and send e-mail successfully</p></li>
  <li><p><strong>Upgraded Sharepoint 2013 SP1</strong></p></li>
  <li><p>Run Workflow <strong>and send e-mail fails</strong></p></li>
  </ol>
  
  <p><p>We tried new install on SP2013SP1 but fails as same(SP2010 Workflow can send e-mail)</p></p>
  
  <p><p>I have installed Fiddler and monitored HTTP message.</p></p>
  
  <p><p><em>Request Address :</em> POST /sites/test1/_vti_bin/client.svc/sp.utilities.utility.SendEmail HTTP/1.1 </p>
  <p><em>Response Header :</em>  HTTP/1.1 400 Bad Request </p>
  <p><em>Response Body :</em> 
  error code=-2147024809, System.ArgumentException 
  value=The parameter 'address' cannot be an empty string.</p></p>
  
  <p><p>Parameter name: address</P></p>
  
  <p><p>Any advice would be helpful.</p></p>