Nopcommerce integrates directly with ConstantContact.com (Constant Contact). Send all customers, newssubscribers, and guests to different contactlists.
Not registered version is fully operational. It has only one limitation. Only 50 customers will be sent. You can try it.
Compatible with NopCommerce 3.40, 3.50, 3.60.
Link to our site http://www.foxnetsoft.com/nopconstantcontact
Price 50$.