I am creating a site and want to have a simple subscribe form on the page and will occasionally send out emails to my users. The site will never be huge so things like phplist and other pieces of software are way overboard for what I need.

I am about to just design it myself but I was wondering if there are any extremely lightweight newsletter scripts out there.

Needs

Form
Database -- Table which holds names and emails
unsubscribe -- which could mark users as unsubscribed or simply delete them from the database as I don't need them anymore.
And a form for me to fill out an email and send it to the user. Text or HTML.

I can do all that. The one thing I might have a problem with is handling script timeouts and such as I am not sure if I know how to send a certain number of emails then wait and send a certain number more depending on what limits my host has on emails.