There are many great email marketing services available to you! The services we recommend depend on how complicated of a setup you are looking for in your marketing campaigns. For general email newsletters and marketing we would recommend MailChimp. MailChimp has a free plan available and allows you to send modern looking emails with targeting, automation and tracking all built in. For email campaigns that are designed to drip emails over time and have advanced conditional logic for emails we would recommend ActiveCampaign or HubSpot. These email marketing services are very robust and will allow you to create advanced email marketing campaigns.