Installing and Configuring Postfix on an Ubuntu 16.04 Web Server
Encryption is great and it should also be applied to the email sent by your mail server. Let's see how to configure Postfix to allow that on your Ubuntu server.
Install a TLS/SSL Certificate with Let’s Encrypt (on Ubuntu 16.04 running Nginx)
Security is an important feature to offer to your visitors and customers. Let's see how to install a TLS certificate to ensure encrypted connections on your website.