Mailivery - Reach the Inbox, not the spam folder.
SendOut - Affordable email marketing for bloggers and influencers
Sidemail - The simplest way to send transactional emails. Sidemail makes sending transactional emails trivial, it's perfect for side projects, MVPs or the next big thing.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid
Mailzak - Give a boost to your #EmailMarketing