There should be an option to build an automated workflow that creates and assigns a call task to a rep when someone opens an email or clicks on a link in the email.
I would think that given HubSpot’s massive client base this would have come up more frequently. My company is also interested in creating a task when a logo opens an email or clicks on a URL. The notification in and of itself isn’t efficient and doesn’t help create a process that helps engage with someone viewing our email in the moment.