You posted this last month as well, asking exactly the same question.

I'm pretty sure that this isn't a function of SSRS though. I haven't seen it in 2008 to 2012 and haven't read anything about the function being added in 2014. When setting up the subscription, you'll need to enter the email address(es) you want it to go to. If it's going to be the same on every one, just have the address in your clipboard.