Use MailChimp to step up your content marketing game. It's free, and allows for HTML emails with advanced tracking and API plug ins. This is the entry level email marketer's tool - the best way to break into a large market.
Tiny Letter Requires only a basic understanding of newsletter formatting to send personalised newsletters. Embed on your site, landing page or even Twitter – with simple reporting this is best for novice content creators or low time-investment sites.