I'm often asked how to integrate MailChimp within your Drupal site. There are a few different options available, depending on what you are tying to achieve. MailChimp is a great resource for sending mass emails, whether just a newsletter, product update or notifications to registered users of an update to your site.
In this blog post I am going to describe a simple but common task of adding a user/visitor to your list on MailChimp. The list in this case is used for gathering users and adding them to newsletter list so that they can be sent a copy and receive vital updates. I have investigated various methods for integrating MailChimp and adding subscribers that are gathered on via a form on the website.