Email reply graphic problem

When contacts complete the form and get a return email, the logo bar at the top of the response extends past the text box. Looks very bad. I have adjusted the size of my logo and it doesn’t seem the change the outcome. Is there a place to change the code?

https://wordpress.org/plugins/dropifi-contact-widget/