If your use case requires this data in Funnel, you can request it as a custom connector.
Custom connectors and data requests are available only in Business and Enterprise plans.
Dimensions
Sent Date
Message ID
Campaign Name
Subject
To
From
Metrics
Sent
Recipient Count
Open Count
Read Count
Click Count
How to request this data
To request PoliteMail data and other data that has not been covered here, submit a data request.