MailChimp is a powerful, easy to use email marketing service. MailChimp helps you design email newsletters, share them on social networks, integrate with services you already use, and track your results. It’s like your own personal publishing platform.
MailChimp also offers a variety of plug-ins for other programs. Utilizing an open API, MailChimp encourages other systems and web applications to integrate with its email marketing engine. They currently offer integrations with systems such as PayPal, Google Analytics, Shopify, Magento, Salesforce, and more.MAILCHIMP.COM