Not sure if this is the correct channel for this question, please excuse me if it is not.
I want to enable double opt-in and when the user clicks the confirmation link, I want to redirect to my site with his email property in the query string, or some way to identify the user on my site form. the form needs to submit some details to my site taken from Hubspot. So it is not a HubSpot form.
Any idea how to achieve this, or direct me to a better channel for this question?