How do we send new subscribers a series of emails (3) ?

I am looking at eNewsletter, which I have installed, and I cannot figure out how to do this so I guess it's not a feature but I wanted to make sure before I give up and take another route. I also don't see this feature in the other plugins, but please do let me know if I have overlooked something.

When someone subscribes I would like them to get 3 properly timed promotional emails that are spread out as per my instructions, like one very week until they get all three.

Is this possible?