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.
Elastic Email - Elastic Email is an all-in-one email delivery platform for both marketing and transactional email.
Mandrill - Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Aritic Mail - Ariticmail is a transactional email delivery API for applications and enterprises.
SendGrid Email API - You can use SendGrid via SMTP or our simple to use Web API. Understand how best to utilize SendGrid.