Postfix and RoundCube

Installation

1. Update and upgrade apt package manager

sudo apt update && sudo apt upgrade -y

2. Install and enable required packages and extensions

     1. Install required packages

sudo apt install lsb-release apt-transport-https ca-certificates php8.1-imagick php8.1-intl php8.1-ldap -y

     2. Open php.ini file

sudo nano /etc/php/8.1/apache2/php.ini

     3. Uncomment below lines

extension=intl # Line 925 
extension=ldap # Line 927

     4. Add following line at the end of Dynamic extensions section

extension=imagick # Line 956

     4. Set your timezone in Date section

date.timezone = Europe/Warsaw # Line 969

3. Install Postfix mail server

sudo apt-get install postfix

During installation, you need to select Postfix type (To finish guide select "Internet Site") and type your server domain (For example: domain.com).

4. Verify installation and check that Postfix is running

sudo postconf mail_version
sudo systemctl status postfix

5. Install Dovecot IMAP and POP3 server

sudo apt-get install dovecot-imapd dovecot-pop3d -y

6. Restart Dovecot server

sudo systemctl restart dovecot

7. Go to main Apache2 directory

cd /var/www/html/

8. Download RoundCube archive

I am installing RC 1.6.0, but you can select RoundCube version here.
Remember to download ONLY COMPLETE versions

sudo wget https://github.com/roundcube/roundcubemail/releases/download/1.6.0/roundcubemail-1.6.0-complete.tar.gz

9. Extract archive

sudo tar -xvf /var/www/html/roundcubemail-1.6.0-complete.tar.gz

10. Change name of your directory with roundcube

sudo mv /var/www/html/roundcubemail-1.6.0 /var/www/html/roundcubemail

11. Change owner and permissions to RoundCube directory

sudo chown -R www-data:www-data /var/www/html/roundcubemail/
sudo chmod 755 -R /var/www/html/roundcubemail/

12. Prepare database for RoundCube

     1. Enter to MySQL

sudo mysql -u root -p

     2. Create database for RoundCube

CREATE DATABASE roundcube DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

     3. Create RoundCube user

CREATE USER roundcube@localhost IDENTIFIED BY 'password';

     4. Grant privileges to created user for created database

GRANT ALL PRIVILEGES ON roundcube.* TO roundcube@localhost;

     5. Refresh privileges granted to users

flush privileges;

     6. Exit from MySQL

quit;

     7. Import data from RoundCube initial SQL file

sudo mysql -u root -p roundcube < /var/www/html/roundcubemail/SQL/mysql.initial.sql

13. Create Apache2 Virtual Host for RoundCube

sudo nano /etc/apache2/sites-available/roundcube.conf 

And paste below code

<VirtualHost *:80>
    ServerName localhost
    DocumentRoot /var/www/html/roundcubemail/
    
    ErrorLog ${APACHE_LOG_DIR}/roundcube_error.log
    CustomLog ${APACHE_LOG_DIR}/roundcube_access.log combined
    
    <Directory />
        Options FollowSymLinks
        AllowOverride All
    </Directory>
    
    <Directory /var/www/html/roundcubemail/>
        Options FollowSymLinks MultiViews
        AllowOverride All
        Order allow,deny
        allow from all
    </Directory>
</VirtualHost>

14. Enable created Virtual Host

sudo a2ensite roundcube.conf

15. Reload Apache2 service to see effects

sudo systemctl reload apache2

Configuration

1. Enter RoundCube installer page

Go to page http://your-server.domain/roundcube/installer

You should see something like this

2. Press NEXT button on bottom section of page

3. Set up config file

In database section type your credentials to roundcube database

In SMTP section set up SMTP port to 25

Select useful extensions

• Archive
• Emoticons
• Enigma
• Filesystem_attachments
• Hide_blockquote
• Markasjunk
• Newmail_notifier

4. Click CREATE CONFIG button on bottom section of page

You should see this notification on the top

But if you see PHP file content, you should do this steps:

    1. Create config file for roundcube

sudo nano /var/www/html/roundcube/config/config.inc.php

     2. Paste content from RoundCube installer to this file

5. Press CONTINUE button and test this 2 sections

If you see only OK after tests you can go forward

6. Remove installer directory from RoundCube

sudo rm -rf /var/www/html/roundcube/installer

7. Set up defaults for sending mails from localhost and allow to log to SMTP with no password

    1. Open default RoundCube config file

sudo nano /var/www/html/roundcube/config/defaults.inc.php

    2. Change following variables

$config['smtp_host'] = 'localhost:25'; # Line 272
$config['smtp_user'] = ''; # Line 276
$config['smtp_pass'] = ''; # Line 280

Save and exit.

    3. Open Postfix main configuration file

sudo nano /etc/postfix/main.cf

    4. Tell Postfix to trust localhost

In second line add following expression

mynetworks_style = host

8. Go to the RoundCube main page

Enter link http://your-server.domain/roundcube

You should see login page

9. Login and start using RoundCube!

If you passed tests from installer you should have test messages in your inbox