nina_online on "[Plugin: Jetpack by WordPress.com] How to Remove default values for contact form"

Hello,

I don't want my contact form to show my name and email by default. I found where to remove the name (grunion-contact-form.php 1572) but cant find an email field in that file.

Also, how would I make this change without it being overwritten upon upgrading?

Thanks!

https://wordpress.org/plugins/jetpack/