Sync WordPress Users and PMPro Members with MailChimp lists.
Specify the subscripiton list(s) for your site's WordPress Users and PMPro Members. If Paid Memberships Pro is installed you can specify additional list settings by membership level.
The plugin has a setting to require/not require MailChimp's double opt-in, as well as a setting to unsubscribe members on level change. This allows you to move members from list to list based on membership level. It is important to note that with this setting active the member will be unsubscribed from ALL other lists on membership level change and will only be subscribed to the list(s) set for their active membership level.