Email

Transactional email is the email sent when something triggered from your Web Application such as resetting the user password.

Postfix is a mail transfer agent (MTA), an application used to send and receive email. It can be configured so that it can be used to send emails by local application only. In this tutorial, you’ll install and configure Postfix as a send-only SMTP server. You’ll also request free TLS certificates from Let’s Encrypt for your domain and encrypt the outbound emails using them.