I am looking for this solution: 1- Create a list in Mailchimp for my forum. 2- Install (a plugin?) in Xenforo to sync all existing users with that list. 3- Every new Xenforo user will be added to the list automatically. 4- I mail all my users and if they unsubscribe they will be out of the list. (this already happens in mailchimp) Anyone that knows how to accomplish this with a plugin or another way ? Thanks.