This tutorial describes how to install TLS to a mail server consisting of Postfix and/or Dovecot by using Let's Encrypt certificates with automatic renewing and firewall management.
The system used for this tutorial was:
$ lsb_release -idrc
Distributor ID: Ubuntu
| /* | |
| * OrientationChange Event Shim | |
| * http://github.com/richtr | |
| * | |
| * Copyright (c) 2012, Rich Tibbett | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * |