What are some alternatives?
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Liftoff - eCommerce & web to print platform
SendGrid - Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free
Ordant - Print Estimating & Order Management ... Simplified - a Cloud based Print MIS that can calculate the cost of your custom print estimates and simplify orders.
Mailgun - A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.
Propago - Propago is a cloud based platform, allowing marketers to better manage the complexities of distributing their brand and marketing materials.