Capture email with pixel after submitting the form with pixel

We want to capture the email of the person after the form was submitted. We gave the email form field the ID “EMAIL” and this code is placed in the “thank you page”. But it doesn’t work, we receive submissions from this pixel with “EMAIL” instead of real email that the user put. Any idea how we can fix it?

The pixel code is below.

!-- BEGIN CODE Formulaire Image →
img src=“{EVENTID}&altid={EMAIL}” width=“1” height=“1” border=“0” /

The read-only link Webflow - Ask Prox

Thank you.