MailChimp is an email marketing service provider, founded in 2001. It has 6 million users that collectively send over 10 billion emails through the service each month. Wikipedia
With MailChimp you will be able to set up monthly news letters or weekly if you would like. This is accomplished by creating a Campaign.
You can also create Templates save them for another time or always have them on hand for use.
You will also be able to export your customer email lists from the cart to the Mail Chimp client to make it easier to send out those Newsletters.
If you’re using Outlook you can integrate Mail Chimp as well to make it easier for you to send and receive.
If you didn’t get your question answered, please contact the Pinnacle Cart Support Team. To submit a ticket, go to the My Account drop-down menu at the top right of the admin area and select Support.