Overriding EmailMessageForm

HI,

I'm trying to add the reCatpcha to the EmailMessageForm which is displayed when a user wants to forward a message to a friend.

However it doesn't seem that this form can be redefined.

Could you please confirm that this cannot actually be done?

I've tried to define a form named EmailMessageForm.form.xml with the following structure:

 

<?xml version="1.0" encoding="UTF-8"?>
<form version="1.0">
    <field id="emailList" />
    <field id="message" />
    <field id="captcha" />
</form>

 but it doesn't seem to have been picked up.

 

This requirement comes after one of our customer did a PEN test and they want to make this form spam proof.

 

Thanks,

Nico