This module interacts with a MailMan mailing list server to provide easy subscription or unsubscription for users. It provides the following features
1. Site administrators can add mailing lists (that already exist on the mailman server) that they want users to subscribe to.
2. Users can restrict which Drupal roles can subscribe/unsubscribe to a list.
3. Alternatively, the module can use the 'sync_members' utility of mailman to syncronize all members of a Drupal role with membership of a mailing list (requires Drush, and that MailMan and Drupal are on the same server or Drupal files are accessible on the mailman server).
This module is not a management utility for Mailman. It simply provides mechanisms for allowing users to subscribe or unsubscribe to a mailing list.