This connector integrates with the Marketing Email API and gives you stats and metadata on outbound marketing emails sent from within HubSpot.
Stats
Counters
Sent
Open
Delivered
Bounce
Unsubscribed
Click
Dropped
Selected
Spamreport
Suppressed
Hardbounced
Softbounced
Pending
Contactslost
Notsent
Ratios
Clickratio
Clickthroughratio
Deliveredratio
Openratio
Unsubscribedratio
Spamreportratio
Hardbounceratio
Bounceratio
Softbounceratio
Contactslostratio
Pendingratio
Other fields
Ab
Ab hours to wait
Ab variation
Ab sample size default
Ab sampling default
Ab status
Ab success metric
Ab test id
Ab test percentage
Absolute url
All email campaign ids
Analytics page id
Analytics page type
Archived
Author
Author at
Author email
Author name
Author user id
Blog email type
Blog rss settings
Campaign
Campaign name
Can spam settings id
Category id
Cloned from
Content type category
Create page
Created
Currently published
Domain
Email body
Email note
Email type
Feedback email category
Feedback survey id
Flex areas
Folder id
Freeze date
From name
Html title
Id
Is graymail suppression enabled
Is local timezone send
Is published
Is recipient fatigue suppression enabled
Lead flow id
Live domain
Mailing lists excluded
Mailing lists included
Max rss entries
Meta description
Name
Page expiry date
Page expiry redirect id
Page redirected
Portal id
Preview key
Processing status
Publish date
Published at
Published by id
Published by name
Publish immediately
Published url
Reply to
Resolved domain
Rss email author line template
Rss email blog image max width
Rss email by text
Rss email click through text
Rss email comment text
Rss email entry template
Rss email entry template enabled
Rss email url
Rss to email timing
Slug
Smart email fields
Style settings
Subcategory
Subject
Subscription
Subscription blog id
Subscription_name
Template path
Transactional
Unpublished at
Updated
Updated by id
Url
Use rss headline as subject
Vids excluded
Vids included
Widgets
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.