API message to trigger email

Hi I'm using the snatchbot API channel on one of my bots to hook up to a contact form that sends customer information using the POST 'https://account.snatchbot.me/channels/api/api/...' request. My issue is that when one message is sent to this bot it only starts the conversation/session and so the 'Await response' interaction isn't triggered, and therefore no email is sent. However if I send the data twice, it does trigger the interaction and send the email.
Is there any interaction/config I can use to send an email whenever any data is sent to that API? If not could the 'Await response' interaction be changed so its triggered on the first message sent?
Kind regards, Kyle.