I was wondering how I can make a mailing list. Even if I have to pay to make one I wouldn't mind.

But when I mean mailing list I am trying to mention one of those boxes you see on people's websites that state that they will give you free updates and information if you sign the mailing list.

Usually on the box it consist of e-mail input and you enter your name, and hit submit which will enter you in the mailing list.

Can anyone help me figure out how this is done? Thanks so much. Even if this is a service, please someone tell me what is the cheapest and most effective way to do this. Thanks.