The Constant Contact app allows you to view mailing lists and control the subscription and unsubscription of the contact right from helpdesk, right from your ticket details and contact details page. 1. You can manage mailing lists and create new users with the option of subscribing or unsubscribing them to the mailing lists. 2. In addition to managing mailing lists, you can also view campaign activity from the campaigns sent to your user. Track metrics like Open history, Click history and Sent history.