How To Install SquirrelMail in Ubuntu/Debian

Enter the domain name for sending and receiving mails.

After setting FQDN, using the below command to start the Postfix mail server.

user1@linuxhelp:~$ sudo service postfix start

Step 3: To Install Dovecot

Execute the below command to install the Dovecot - a mail delivering agent.

user1@linuxhelp:~$ sudo apt-get install dovecot-imapd dovecot-pop3d
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  dovecot-core liblockfile-bin liblockfile1 lockfile-progs ntpdate
.
.
.
Processing triggers for libc-bin (2.21-0ubuntu4.1) ...
Processing triggers for systemd (225-1ubuntu9.1) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for dovecot-core (1:2.2.18-2ubuntu2) ...

Start the Dovecot service by executing the below command.

user1@linuxhelp:~$ sudo service dovecot start

Step 4: To Install SquirrelMail

Install SquirrelMail, by running the following command.

user1@linuxhelp:~$ sudo apt-get install squirrelmail
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  squirrelmail-locales squirrelmail-viewashtml
.
.
.
Setting up squirrelmail-locales (1.4.18-20090526-1) ...
Setting up squirrelmail-viewashtml (3.8-3) ...
Removing plugin view_as_html
Data saved in config.php
Activating plugin view_as_html
Data saved in config.php

To configure SquirrelMail execute the following command.

user1@linuxhelp:~$ sudo squirrelmail-configure

In the prompt window, type ' 2' to edit the server settings and type ' 1' to change the domain name.

Type ' R' to return to the main page. To configure the general options type ' 4' .

Now type ' 11' to change the setting of ' Allow server-side sorting' to ' true' by typing ' y' . Hit Enter and type ' S' to save the changes that you have made in the configuration file.

Copy the default configuration file to the apache2 directory to access the web interface, by using the following command.

user1@linuxhelp:~$ sudo cp /etc/squirrelmail/apache.conf /etc/apache2/sites-available/squirrelmail.conf

Run the following command to enable it.

user1@linuxhelp:~$ sudo a2ensite squirrelmail.conf
Enabling site squirrelmail.

To activate the new configuration, run the following command.

user1@linuxhelp:~$ service apache2 reload

Step 5: To create Mail Users

Create new user by running the following command.

user1@linuxhelp:~$ sudo useradd user2
user1@linuxhelp:~$ sudo passwd user2
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully

Create a home folder for the user in ' /var/www/html/myusername' and make it as a default home directory.

user1@linuxhelp:~$ sudo mkdir -p /var/www/html/user2
user1@linuxhelp:~$ sudo usermod -m -d /var/www/html/user2 user2
usermod: directory /var/www/html/user2 exists

Provide full permission to user by running the following command.

user1@linuxhelp:~$ sudo chown -R user2.user2 /var/www/html/user2

After setting permission to the user, Login to the mail.