SSRS Email Subscription Problem???

Hi All,

I need help. I am using SSRS(UI) side for subscribe report email. I configured it and schedule a time however i am getting this error"Failure sending mail: The specified string is not in the form required for 
an e-mail address.Mail will not be resent." I am using my email address as an test in To Column and email i am puting like this as an e.g (abc@xyz.org). Please guide me to the right direction.

Thank You,

Msbilearning