The Newsletter module allows you to create multiple contact forms you can use as newsletter system of your shop.
If the module has been activated, in the sideber of your site you will find the Newsletter custom post type you can use to configure the contact forms for your newsletters.
1. Create a Newsletter Form
Click on Newsletter Form > Add New Form:
You can create three different kind of newsletter form trough Form integration preset field.
1.1 Custom Form
with this kind of newsletter you can send custom form info to a specific url (trough action field). Es: http://www.mywebsite.com/newsletter-subscribe.php
here you can find the documentation and read how to use MadMimi API key
here you can find the documentation and read how to use MailChimp API key
After a newsletter form is created, it will display in newsletter form list where you can see the shortcode column as showed below:
This is how your wishlist will show trough his shortcode :
click here for more shortcode details.