Validations on the E-mail to make sure the E-Mail does exist.

Also I was now wondering if there are any ways to input more validations on the E-mail to make sure the E-Mail does exist. Ive seen some APIs around, which I guess check by sending an E-Mail and see if it bounces back or not. Is something like this possible? :P 

You could use the E-mail Validator widget instead: http://widgets.jotform.com/widget/e-mail_validator 

If you need anything else, please open an new thread, we will be glad to assist you.

Take notice this form should is a quick form. We would not like to make our users have to go to their email and back for them to be able to go to what comes next. Ive seen another two widgets that kind of do the same. But one costs and the other one is just for syntax. But well Thanks for the support either way :D

try the XVerify Email - Powered by Xverify®s powerful verification engine, this widget will add an email field on your form which check the validity of the entered email address in a single step. All this happens automatically in the background, and it only takes a second. If the email is not valid or does not exist, your form user will get feedback right away, and will enter a valid email address. http://widgets.jotform.com/app/xverify_email

Yes, I suggest trying the xverify email widget. This verifies the email entered on the field instantly without a need of manually checking something on email to verify. http://widgets.jotform.com/widget/xverify_email