jtcope on "[Plugin: Contact Form 7] Why does my gmail inbox do this"

I am in the testing phase with the forms, but why does it say this in my inbox? Tammy Copeland via gator328.hostgator.com. I use host gator for my hosting, I do not want this to show in peoples inboxes after they fill out the form.

http://wordpress.org/extend/plugins/contact-form-7/