Please include the original CC list in the quoted header (or provide an option to show it), so we can clearly demonstrate which stakeholders were included in earlier emails to recipients outside of HubSpot.
This is a sore spot for detractor-users as it makes the email tool seem inefficent or incomplete. The workaround to the direct email provider goes against the mission of working within HubSpot, does not account for individual user behavior, or group inbox settings.