We are a software company.
Each user in our app can elect to “subscribe” or “unsubscribe” from the monthly newsletter in their User Profile.
Up until know, we have been using Mailchimp to create and send our newsletters and we have used their API to maintain the list when the User Profile is created (subscribe) or changed (unsubscribe).
Mailchimp also gives us a double way communication because we receive a callback when a user unsubscribes from Mailchimp directly.
How do we do this in HubSpot? Subscribe and Unsubscribe from a list directly from our App… API?