iMailinglist Pro is a complete collection of CGI and MySQL scripts that will let you run your own profitable, high-traffic mailing list site with complete control with a few clicks of the mouse. With a complete administrative section and members' section.

http://2work-online.com/irebillingpro-features.shtml

Features:

Automated new member email verification system
Fully automated subscribe and unsubscribe system
Complete member profile access through both Members & Admin Section
Members can sign up for text-based or HTML-based emails
Members can switch from html to text-based at any time
Built-In Referral Program & Tracking system. Offer rewards for getting subscribers.
Complete control through a web-based administrative section
Built-In easy to use web-based mailer for both sending Newsletter & Contact Emails
Easily add a site-wide banner through the web-based admin section
Built-In Page Editor through the Admin Section
Built-In Email Editor through the Admin Section
Easy to set up, use and run!
Subscriber sign-up date and IP address is recorded for your security
Runs on any hosting account with just CGI & MySQL support!
Anyone can use it; from newbies to internet guru's!
See list of unverified emails. Manually verify if you want.
And More...