How to define mailing recipients While creating a custom form

You can follow the steps below in order to define mailing recipients for a custom form.

>Login to your admin panel dashboard.
> Under Site section click on forms. 
>Click on Add new and then go to settings.
> Under actions click on add action
> Select type to "Send Email"
> Choose from existing mail template, reciever's email and Attachment Fields.
> Click on Save Action in the forms and then click on Save icon on the top Right Hand Side.