Is there a way to implement background form submission as soon as a person clicks on the email?
Yes, but you do not want to do this.
Requiring deliberate interaction with a CTA form is the primary way of distinguishing humans from automated mail scanners.
If you do not require human interaction, then a mail scanner that follows a clicked link and loads the subsequent web page will also submit the form. Meaning the form submission is also automated.
What are you actually trying to accomplish at the business level? Let's start there.
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