How have sender email address show up automatically as reply to?

I have learned from instructional videos and guides on your website.

What am I missing or messing up?

From my understanding, notifications are setup to send by email a sender's responses to a form being filled in.

The sender's email is clearly captured, from a required field in the form filled in.

The attached screenshot, is from your video about how to set up a notification.

Drop down menu choices for Sender E-mail: include E-mail and noreply@jotform.com.

Below the screenshot of your video are my choices for Sender E-mail: exclude E-mail.

The closest choice is "Add A Sender Email". However to do this, my logic thinks I would need to know the emails of everyone that would fill in my form in advance.

How can I set things up, so notifications I receive and send onto others to act on, can be replied to by in our hotmail by just pressing reply? Right now the sender's email address needs to be copied from the included form and pasted into the reply field.

Hi,

The sender email address is who will be sending the email.  Usually this is left as "noreply@jotform.com" unless you need to setup a custom SMTP to send the mail from your servers:

http://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form

However, usually this is only done for the auto response emails.  If you would like the "Reply-to Email to reply to your user when replying to email, you would need an email field in your form to collect the data and then change the "Reply-to Email" to this field.  Email notifications are only sent to you and not your users.

To set up a response email to your users, you would need to use a form auto responder:

http://www.jotform.com/help/26-Creating-a-Form-Autoresponder

Please let us know if you have any further questions and we will be happy to help.

Thank you for using JotForm!