mailchimp 5.x-1.x-dev

1. Support for an unlimited number of mailing lists
2. Having an anonymous sign up form to enroll users in a general newsletter.
3. list access by role
4. editing of user list subscriptions on the user's edit page
5. list subscribe on register page
6. customizable merge vars with token, profile and bio.module integreation
7. opt-in, opt-out and required lists
8. standalone subscribe and unsubscribe forms