Ubuntu 22.04
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Apache2 : Web Mail : RoundCube
2022/05/17
 
Install RoundCube to configure web-based mail transfer System.
On this example, it uses 2 servers like follows to configure RoundCube Mail.
+----------------------+          |          +----------------------+
|  [  www.srv.world  ] |10.0.0.31 | 10.0.0.32|  [ mail.srv.world  ] |
|     Apache httpd     +----------+----------+        Postfix       |
|      (Roundcube)     |                     |        Dovecot       |
|       MariaDB        |                     |                      |
+----------------------+                     +----------------------+

[1]
[2]
[3]
[4]
[5]
[6]
[7] Create a Database for RoundCube.
root@www:~#
mysql

Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 37
Server version: 10.6.7-MariaDB-2ubuntu1 Ubuntu 22.04

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

# create [roundcube] database
# replace [password] to your own password you'd like to set
MariaDB [(none)]> create database roundcube; 
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> grant all privileges on roundcube.* to roundcube@'localhost' identified by 'password'; 
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> flush privileges; 
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> exit 
Bye
[8] RoundCube のインストールと設定です。
root@www:~#
apt -y install roundcube roundcube-mysql
# select [No] on this example (set manually later)

 +----------------------+ Configuring roundcube-core +-----------------------+
 |                                                                           |
 | The roundcube package must have a database installed and configured       |
 | before it can be used.  This can be optionally handled with               |
 | dbconfig-common.                                                          |
 |                                                                           |
 | If you are an advanced database administrator and know that you want to   |
 | perform this configuration manually, or if your database has already      |
 | been installed and configured, you should refuse this option.  Details    |
 | on what needs to be done should most likely be provided in                |
 | /usr/share/doc/roundcube.                                                 |
 |                                                                           |
 | Otherwise, you should probably choose this option.                        |
 |                                                                           |
 | Configure database for roundcube with dbconfig-common?                    |
 |                                                                           |
 |                    <Yes>                       <No>                       |
 |                                                                           |
 +---------------------------------------------------------------------------+

root@www:~#
cd /usr/share/dbconfig-common/data/roundcube/install

root@www:/usr/share/dbconfig-common/data/roundcube/install#
mysql -u roundcube -D roundcube -p < mysql

Enter password:  
# MariaDB roundcube password

root@www:/usr/share/dbconfig-common/data/roundcube/install#
root@www:~#
vi /etc/roundcube/debian-db.php
# set database info

$dbuser='
roundcube
';
$dbpass='
password
';
$basepath='';
$dbname='
roundcube
';
$dbserver='localhost';
$dbport='3306';
$dbtype='
mysql
';
root@www:~#
vi /etc/roundcube/config.inc.php
# line 36 : specify IMAP server (STARTTLS setting)

$config['default_host'] = 'tls://mail.srv.world';
# line 50 : specify SMTP server (STARTTLS setting)

$config['smtp_server'] = 'tls://mail.srv.world';
# line 53 : specify SMTP port (STARTTLS setting)

$config['smtp_port'] = 587;
# line 57 : change (use the same user for SMTP auth and IMAP auth)

$config['smtp_user'] = '%u';
# line 61 : change (use the same password for SMTP auth and IMAP auth)

$config['smtp_pass'] = '%p';
# line 68 : change to any title you like

$config['product_name'] = 'Server World Webmail';
# add follows to the end
# specify IMAP port (STARTTLS setting)
$config['default_port'] = 143;

# specify SMTP auth type
$config['smtp_auth_type'] = 'LOGIN';

# specify SMTP HELO host
$config['smtp_helo_host'] = 'mail.srv.world';

# specify domain name
$config['mail_domain'] = 'srv.world';

# specify UserAgent
$config['useragent'] = 'Server World Webmail';

# specify SMTP and IMAP connection option
$config['imap_conn_options'] = array(
  'ssl'         => array(
    'verify_peer' => true,
    'CN_match' => 'srv.world',
    'allow_self_signed' => true,
    'ciphers' => 'HIGH:!SSLv2:!SSLv3',
  ),
);
$config['smtp_conn_options'] = array(
  'ssl'         => array(
    'verify_peer' => true,
    'CN_match' => 'srv.world',
    'allow_self_signed' => true,
    'ciphers' => 'HIGH:!SSLv2:!SSLv3',
  ),
);

root@www:~#
vi /etc/apache2/conf-enabled/roundcube.conf
# line 3 : uncomment

Alias /roundcube /var/lib/roundcube/public_html
# line 11 : change access permission if need

Require
ip 127.0.0.1 10.0.0.0/24
root@www:~#
systemctl restart apache2
[9] Access to [https://(your server's hostname or IP address/)/roundcube/], then Roundcube login form is shown, authenticate with any user on Mail Server.
[10] After successfully logined, verify possible to send or receive emails normally.
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