Storing email addresses

Hi-- If I put up an email address form on my site to capture email addresses to mail once something is released-- how/where can I capture them? I figure the low-budget slow way is just to mail them all to myself and aggregate them-- but that’s way too time consuming and I know there has to be a better way as this is something most people would have needed. Any help is really appreciated. Thanks! surya

I’m on it now-- thanks so much!