NeverBounce is a third-party real-time email verification and email cleaning service. Included in the features available with NeverBounce is a widget that you can easily add to your Formstack form to verify emails entered into your email address fields are real emails.
Note: NeverBounce's widget is currently in beta.
First, you will need to sign up with NeverBounce if you haven't already. Once you are signed up you will need to register the widget. When you click the register widget options will show. Here you will need to name the widget. There are also options for domain-specific restrictions and throttling options, these are not required but if you are interested you can learn about them here.
Once you've entered your widget registration options and click Save you will be redirected to a page that will contain the widget snippet. The snippet is in the box at the top of the page. You will need to copy this snippet and then you are ready to go to your Formstack account.
In your Formstack account go to Forms > choose your form and then Build. In order for the widget to work, you will need to have an Email Address field on the form. If you don't already, drag the Email Address field into the form and also add an Embed Code field to the form. We suggest adding the Embed Code field to the top of the form.
Once you have an Email Address field and an Embed Code field click on the Embed Code field and copy the snippet from NeverBounce into the text box in the left-hand options. When the script is added you are good to go and you can then click View Live Form in the top right-hand corner and test the email verification.
Please Note: This is not a supported feature with Formstack. This means that updates to the application are not tested for compatibility with this widget.
Q & A:
Can I use this if I have more than one email address field?
Yes, the script will work on all fields that are added as Email Address fields. It will NOT work if you have another field type (such as a Short Answer field) that is labeled Email Address.
What does it cost?
It is free in Formstack to add the widget but you will need to pay for NeverBounce to use their service.