SendinBlue.com Easily manage your Email Marketing campaigns, Transactional Emails, and SMS messages.
MailChimp Free up to 2,000 subscribers and 12,000 emails per month
Mandrill Send transactional email in an easy way
Amazon SES cost-effective outbound-only email-sending service.
Mailgun The email service for developers
SendGrid Email Delivery & Transactional Email Service
MinuteMailer create, send and schedule amazing newsletters, plain emails, Facebook-posts and tweets.
GetResponse World's easiest email marketing
Aweber Connections that last are built in Inbox
Mailup The Email & SMS Delivery Solution
InfusionSoft Powerful sales and marketing software for small businesses
Active Campaign Email marketing and automation