Expose the "in reply to" node in your Zapier integration.
The Zapier integration desperately needs the "in reply to" node exposed for logic such as ticketing systems.
Add support in the zapier integration for additional API supported parameters such as Reply-To, tag, tracking, and my-var.
This can be closed. It turns out this has been there the whole time and no one knew. The "confusion" is that the node is only there when the message is a reply. It makes sense but it looks like in some cases, other nodes are present even when there is no data in the node so no one thought that the field existed.