Delivers and tracks transactional emails for web applications. Replaces SMTP/sendmail on the server and provides a reliable and scalable environment. In addition, you can track statistics for number of emails sent, bounces and spam complaints. The API uses RESTful protocol and responses are formatted in JSON.
So you need to send emails. Pretty simple right? Not so fast. It doesn’t matter how easy your language or framework makes sending emails, if you try to do it on your own be prepared to configure mail servers, setup Spam-related DNS entries, and still wonder if mail is actually being delivered. And your applications needs to process incoming email? Back to the config files, piping mail to your script - or just end up polling a POP or IMAP box. That’s what I had to do, back in the day. Fortunately, like so many things today, there’s an API for that. Actually there are a few.