Which email marketing platforms have you worked with in the past, and which is your favorite?

By sharing your experience with email marketing platforms (also called ESP - Email Service Providers), hiring managers will get to know your knowledge of the competition and overall industry. Selecting a 'favorite' platform will let them know which aspects you find important when evaluating an email marketing platform. Include reasons you find a specific platform superior over others in the industry. If you have not worked with many, be sure to mention the ones you are at least aware of to showcase your industry knowledge.