Adobe Campaign allows you to create and manage newsletters and cross-channel communications, through a set of services. Messages can only be sent to profiles who subscribed to the service (opt-in). These profiles are identified using a dedicated filter when creating a message.
Subscription mechanisms can be set up to offer your customers a chance to subscribe to these services, notably though emails and landing pages.
Each service comes with:
This video shows you how to create a service and manage its subscriptions.