This connector integrates with the Marketing Email API and gives you stats and metadata on outbound marketing emails sent from within HubSpot.
The stats you can get out:
- sent
- open
- delivered
- bounce
- unsubscribed
- click
- dropped
- selected
- spamreport
- suppressed
- hardbounced
- softbounced
- pending
- contactslost
- notsent
Some of these also have ratio metrics that compares with the grand total.
There are more information in HubSpots API documentation. Read more about email metadata fields here. And details about the stats you can get out can be found here.