What are some alternatives?
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Email Planner - Email campaign planner for last minute Marketers
SendGrid - Learn why more developers choose SendGrid for their email deliverability service to send transactional emails triggered by web apps. Get started for free
Inkit - Direct Mail Software. Inkit is an inbound and outbound marketing platform that helps companies gain visitors, convert leads, and win sales.
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.
Campaign Genius - Send dynamic email content through any platform, instantly.