Emails we receive off our Homestead website all say they are coming from the same person, when they're not. We also wonder if when we reply to the customer if it shows up as our website or as this wrong name.
I do not see any email address configured on your account. I do see old DNS records though. I have updated the mail records in case you want to create one.
If you are referring to a form submission, they do come from a script on your site. They are not sent by the user. You do not reply to these messages. Best to collect their email in the form and then create a new email to respond.