When I try to use the webhook, I get an invalid email error. If I use the same exact URL outside of Unbounce, I can confirm that it is working correctly. I believe there is an issue with the email address in the form feeding into the URL parameter.
Here’s an example of the URL (I’ve replaced my domain with mycompany):
To check the URL structure, I replaced the variables with actual data and confirmed that it is working as expected.