I frequently find myself starting an email thread in a browser tab in HS. And later, end up responding to my client's response from my email client. Because I responded to my client from a 3rd party mail client and used BCC, there is no tracking.
Given that the original email was tracked, why can't the subsequent emails also be tracked? Or why can't we have something to include into the body of a new email or bury in a signature that would cause tracking on a BCC email?