> 1) You need an IP address in good standing. If you don't have that (if you are on EC2), you might need to sign up for an SMTP service (or sendgrid, but my con

> 1) You need an IP address in good standing. If you don't have that (if you are on EC2), you might need to sign up for an SMTP service (or sendgrid, but my concerns of using a nonstandard JSON API over the SMTP standard still stand). You only need the JSON API header if you want to use their "apps". If all you want is to send simple emails you can just use their SMTP server as a real SMTP server.