Subscription: subscribe2 alternatives?

Hi,

I’ve used subscribe2 for my subscriptions so far, but after changing to another template it stopped working (the <–subscribe2–> tag isn’t converted anymore).

I’d like to change it anyway, as it doesn’t support captcha’s.

Is there another simple blog post notification plugin (maybe even a native way in WordPress) to allow email subscriptions? I’d like to keep the email database of the subscribe2 plugin…

thanks!
felr