Email link confirmation to user submit form

Please if there is a chance to make a option that people have to confirm the added form by mail by pressing the link. So this nice thing will be albe to be used as newsletter too. There is a option “Entries Allowed” so if You do like 5 places and someone change ip and spam those 4 places he will be in the from with 1 entry him and other 4 fakes. It can be handy to prevent people to spam to make less places so confirmation email could slow them down.

http://wordpress.org/plugins/visual-form-builder/