I have two problems - we had a script on a joomla page that gave the user a box and submit button on the front page, a user would sign up for newsletter, they were emailed a confirming letter, and after confirmation, the info was sent onto the webmaster.
It worked pretty well in killing the spam.
Now - the former webmaster wants to take him script with him.
Is there something like that available?
Can this be done without generating a bunch of spam?
there are plenty scripts like that. since the whole double opt-in-thingy is required by law in most countries, I doubt there are many script that fail to do it. since you're mentioning joomla, you might want to look at the php-scripts, like phplist. check your friendly neighborhood search engine for more.