Email sign up form

Is there a way to create an email sign up form in Raisers Edge NXT? From what I have found, it was at one time possible in Online Express, but now it looks like that is phasing out (it says I would have to reactivate it, which I'd rather not do as I don't know all the implications…) and I don't see another way?

We are simplifying and trying not to use too many different programs, we're a small school and the costs and time really add up! Direct school correspondence we do through Blackbaud k-12, and general supporter and donor mailings we have been using RE NXT. This is fine, but we don't have a place that people can just sign up to join the list anymore! So what I am looking for is a way to build an email sign up form to embed on our website.