GetResponse is another popular web service to create, send and track analytics data for your newsletters.
It has a great usability and offers a lot of features. You can import contacts and add custom fields for them in your database, create newsletters using custom HTML code or beautiful built-in templates that can be modified as you want; as a plus, is display in in real time how your email will look on mobile phone.
You can create and send surveys, view detailed analytics and reports. It has multiple tools to create different types of newsletter subscription forms to insert them into your site.
It is good at managing Contacts.
It includes all essential tools to create and send.
It offers advanced tracking and reports.
Although it looks a little overwhelming, GetResponse is extremely user and details oriented. It makes easy to use its complex features and for sure it's one of the best newsletter sending services.