I am trying to send email from my sharepoint hosted app using the workflow(in Visual studio 2012)

Hi,

I am trying to send email from my sharepoint hosted app in Sharepoint 2013 using the workflow(in Visual studio 2012), as shown in link http://hasan-nasir.blogspot.in/2013/06/send-email-in-sharepoint-hosted-app.html . Code not showing any error but not sending mails either can you please help me finding the reason .

Thanks

Namrata