So I have an interesting challenge where our product sends out trial emails independently of Marketo. I wanted to see if anyone in the community had any experience of tracking an external send in Marketo. Currently these leads are being created and synced directly from SFDC which has an integration with our product (where Marketo currently does not). I wanted to see if it is possible to use the munchkin/ REST api to gain some insights into email opens & deliveries from outside of Marketo? It doesn't seem to be straightforward and I'm not sure if it is even achievable.