Hello,

thats surely possible and very easy to do. If you go to CMS desk -->Tools -> Forms -->click edit on appropriate contact form --> Notification e-mail tab

To the "From e-mail" textbox you can insert macros. So if you would like to insert value of the email from the form some visitors submits you may use macro like "{%Email%}" where the Email is the name of the item from the form you want to use.

You can find more info and more precise directions at http://devnet.kentico.com/docs/devguide/index.html?messaging_e-mail_notifications.htm