In our Premium Integrations for HubSpot Contact and Company Objects you’ll find the event status codes in the Contact or Company Timeline.
Also with Premium you have the option of selecting if and which events you want to receive back.
Learn more here: Premium - HubSpot Timeline Event Status Codes.
In the Basic Integration, Postalytics will create a custom field in the HubSpot Contact with the Mail Drop ID number of your Campaign. Each time a new event status is available, it will override the last one in that field.
Learn more here: Basic - Event Status Codes In HubSpot Contacts.