We have our own project management system which will be used as the front-end. We like to use HubSpot as the backend.
So far, using the HubSpot API, we could create tickets, create email engagements, and associations. In most of the scenarios, we have HubSpot API to achieve. One of the use case, I could not find and I need some guidance.
At present, we send or receive emails in HubSpot. Which API I can use to reply (response) to the received email. This API should not send our email as a new email, it must be sent as a reply to one of the received emails. Thanks in advance.