Ubuntu

Until now, we have installed Postfix, Dovecot, spam-assassin, and other tools separately. In this recipe, we will learn how to install the Zimbra collaboration server, which covers all tools in a single package. The Zimbra server contains Postfix, MySQL, OpenLDAP, ClamAV, and Spam-Assassin, Calendar, and various other features. Zimbra provides a paid option as well as an open source version. We will be installing an open source version of the Zimbra server in single server mode.

Getting ready

Sometimes you may face problems such as e-mails not being sent, delayed delivery or mail bouncing, issues while fetching e-mails, and login failures. In this recipe, we will learn how to identify the exact problem behind these issues. We will learn how to use debugging tools and read the logs of Postfix and Dovecot.

Getting ready

You will need access to a root account or an account with sudo privileges.

It is assumed that you have already installed Postfix and Dovecot servers.

How to do it…

In this recipe, we will learn how to install and set up a well-known e-mail filtering program, spam-assassin.

Getting ready

You will need access to a root account or an account with sudo privileges.

You need to have Postfix installed and working.

How to do it…

Follow these steps to filter mail with spam-assassin:

Install spam-assassin with the following command:

$ sudo apt-get update

$ sudo apt-get install spamassassin spamc

In this recipe, we will learn how to add e-mail accounts to Postfix. The easiest way to add a new e-mail account to Postfix is to add a new user account on your server. Postfix will check for user accounts and deliver e-mails to respective users. We will create a virtual user setup so that we do not need to create user accounts for each e-mail user.

Getting ready

You will need access to a root account or an account with sudo privileges.

I assume that you have completed your basic Postfix setup and that it is working properly.

In this recipe, we will learn how to install and set up Dovecot to enable accessing e-mails over IMAP and POP3 protocols. This will enable mail clients such as thunderbird to download e-mails on a user's local system.

Getting ready

You will need access to a root account or an account with sudo privileges

Make sure that you have set up Postfix and are able to send and receive e-mails on your server.

You may need an e-mail client to connect to and test the Dovecot setup.

How to do it…

In this recipe, we will set up Postfix Mail Transfer Agent (MTA). This will be a very basic setup which will enable us to send and receive e-mails from our server. Postfix is an open source MTA which routes e-mails to their destination. It is a default MTA for Ubuntu and is available in Ubuntu's main package repository.

Getting ready

You will need access to a root account or an account with sudo privileges.

In this article, we will learn how to set up an e-mail server. We will be using Postfix MTA to send e-mails and Dovecot to enable receiving e-mails. We will also install the Zimbra e-mail server, which is all-in-one one package to set up sending and receiving e-mails and web access. By the end of this article, you will be able to send e-mails with your own e-mail server.

In this recipe, we will cover some common issues with Apache and Nginx and list the basic steps for overcoming those issues. The steps mentioned here are general troubleshooting methods; you may need to change them based on your setup and environment.

Getting ready

You may need root level access to your web server system.

How to do it…

In this recipe, we will learn some steps for securing web server installation.

Getting ready

You will need access to a root account or an account with sudo privileges.

You may need to have a web server stack installed and running.

How to do it…

Follow these steps to secure the web server:

Disable any unwanted modules. You can check all enabled modules with the following command:

$ a2query -m

Disable modules with the following command:

$ sudo a2dismod status