It looks like you need to change the default replyTo address.
Look at the documentation on the function you're using: sendEmail(to, replyTo, subject, body)
The default of replyTo is "the user's email address". Just change it to a string of the email you want to use, i.e.:
sendEmail(e.values[7], "your_email@gmail.com", ' ok!, ' + e.values[2], html,{htmlBody: html})