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Installing Roundcube

Download Roundcube 1.6.x to the web htdocs directory and extract it (here rc/):

# Check for a newer release!
cd data/web
wget -O - | tar xfvz -

# Change folder name
mv roundcubemail-1.6.0 rc

# Change permissions
chown -R root: rc/

If you need spell check features, create a file data/hooks/phpfpm/ with the following content, then chmod +x data/hooks/phpfpm/ This installs a local spell check engine. Note, most modern web browsers have built in spell check, so you may not want/need this.

apk update
apk add aspell-en # or any other language

Create a file data/web/rc/config/ with the following content. - Change the des_key parameter to a random value. It is used to temporarily store your IMAP password. - The db_prefix is optional but recommended. - If you didn't install spell check in the above step, remove spellcheck_engine parameter and replace it with $config['enable_spellcheck'] = false;.

if (!file_exists('/tmp/mime.types')) {
file_put_contents("/tmp/mime.types", fopen("", 'r'));
$config = array();
$config['db_dsnw'] = 'mysql://' . getenv('DBUSER') . ':' . getenv('DBPASS') . '@mysql/' . getenv('DBNAME');
$config['imap_host'] = 'tls://dovecot:143';
$config['smtp_host'] = 'tls://postfix:587';
$config['smtp_user'] = '%u';
$config['smtp_pass'] = '%p';
$config['support_url'] = '';
$config['product_name'] = 'Roundcube Webmail';
$config['des_key'] = 'yourrandomstring_changeme';
$config['log_dir'] = '/dev/null';
$config['temp_dir'] = '/tmp';
$config['plugins'] = array(
$config['spellcheck_engine'] = 'aspell';
$config['mime_types'] = '/tmp/mime.types';
$config['imap_conn_options'] = array(
  'ssl' => array('verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true)
$config['enable_installer'] = true;
$config['smtp_conn_options'] = array(
  'ssl' => array('verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true)
$config['db_prefix'] = 'mailcow_rc1';

Point your browser to https://myserver/rc/installer and follow the instructions. Initialize the database and leave the installer.

Delete the directory data/web/rc/installer after a successful installation!

Configure ManageSieve filtering

Open data/web/rc/plugins/managesieve/ and change the following parameters (or add them at the bottom of that file):

$config['managesieve_host'] = 'tls://dovecot:4190';
$config['managesieve_conn_options'] = array(
  'ssl' => array('verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true)
// Enables separate management interface for vacation responses (out-of-office)
// 0 - no separate section (default),
// 1 - add Vacation section,
// 2 - add Vacation section, but hide Filters section
$config['managesieve_vacation'] = 1;

Enable change password function in Roundcube

Open data/web/rc/config/ and enable the password plugin:

$config['plugins'] = array(

Open data/web/rc/plugins/password/password.php, search for case 'ssha': and add above:

        case 'ssha256':
            $salt = rcube_utils::random_bytes(8);
            $crypted = base64_encode( hash('sha256', $password . $salt, TRUE ) . $salt );
            $prefix  = '{SSHA256}';

Open data/web/rc/plugins/password/ and change the following parameters (or add them at the bottom of that file):

$config['password_driver'] = 'sql';
$config['password_algorithm'] = 'ssha256';
$config['password_algorithm_prefix'] = '{SSHA256}';
$config['password_query'] = "UPDATE mailbox SET password = %P WHERE username = %u";

Integrate CardDAV addressbooks in Roundcube

Download the latest release of RCMCardDAV to the Roundcube plugin directory and extract it (here rc/plugins):

cd data/web/rc/plugins
wget -O -  | tar xfvz -
chown -R root: carddav/

Copy the file to (here in rc/plugins/carddav) and append the following preset to the end of the file - don't forget to replace with your own hostname:

$prefs['SOGo'] = array(
    'name'         =>  'SOGo',
    'username'     =>  '%u',
    'password'     =>  '%p',
    'url'          =>  '',
    'carddav_name_only' => true,
    'use_categories' => true,
    'active'       =>  true,
    'readonly'     =>  false,
    'refresh_time' => '02:00:00',
    'fixed'        =>  array( 'active', 'name', 'username', 'password', 'refresh_time' ),
    'hide'        =>  false,
Please note, that this preset only integrates the default addressbook (the one that's named "Personal Address Book" and can't be deleted). Additional addressbooks are currently not automatically detected but can be manually added within the roundecube settings.

Enable the plugin by adding carddav to $config['plugins'] in rc/config/

If you want to remove the default addressbooks (stored in the Roundcube database), so that only the CardDAV addressbooks are accessible, append $config['address_book_type'] = ''; to the config file data/web/rc/config/

Optionally, you can add Roundcube's link to the mailcow Apps list. To do this, open or create data/web/inc/ and add the following code-block:

NOTE: Don't forget to add the <?php delimiter on the first line

$MAILCOW_APPS = array(
    'name' => 'SOGo',
    'link' => '/SOGo/'
    'name' => 'Roundcube',
    'link' => '/rc/'

Upgrading Roundcube

Upgrading Roundcube is rather simple, go to the Github releases page for Roundcube and get the link for the "complete.tar.gz" file for the wanted release. Then follow the below commands and change the URL and Roundcube folder name if needed.

# Enter a bash session of the mailcow PHP container
docker exec -it mailcowdockerized-php-fpm-mailcow-1 bash

# Install required upgrade dependency, then upgrade Roundcube to wanted release
apk add rsync
cd /tmp
wget -O - | tar xfvz -
cd roundcubemail-1.6.0
bin/ /web/rc

# Type 'Y' and press enter to upgrade your install of Roundcube
# Type 'N' to "Do you want me to fix your local configuration" if prompted

# If you see  "NOTICE: Update dependencies by running php composer.phar update --no-dev" just download composer.phar and run it:
cd /web/rc
php composer.phar update --no-dev
# When asked "Do you trust "roundcube/plugin-installer" to execute code and wish to enable it now? (writes "allow-plugins" to composer.json) [y,n,d,?] " hit y and continue.

# Remove leftover files
cd /tmp
rm -rf roundcube*

# If you're going from 1.5 to 1.6 please run the config file changes below
sed -i "s/\$config\['default_host'\].*$/\$config\['imap_host'\]\ =\ 'tls:\/\/dovecot:143'\;/" /web/rc/config/
sed -i "/\$config\['default_port'\].*$/d" /web/rc/config/
sed -i "s/\$config\['smtp_server'\].*$/\$config\['smtp_host'\]\ =\ 'tls:\/\/postfix:587'\;/" /web/rc/config/
sed -i "/\$config\['smtp_port'\].*$/d" /web/rc/config/
sed -i "s/\$config\['managesieve_host'\].*$/\$config\['managesieve_host'\]\ =\ 'tls:\/\/dovecot:4190'\;/" /web/rc/config/
sed -i "/\$config\['managesieve_port'\].*$/d" /web/rc/config/

Let admins log into Roundcube without password

First, install plugin dovecot_impersonate and add Roundcube as an app (see above).

Edit mailcow.conf and add the following:

# Allow admins to log into Roundcube as email user (without any password)
# Roundcube with plugin dovecot_impersonate must be installed first


Edit docker-compose.override.yml and crate/extend the section for php-fpm-mailcow:

version: '2.1'

Edit data/web/js/site/mailbox.js and the following code after if (ALLOW_ADMIN_EMAIL_LOGIN) { ... }

  item.action += '<a href="/rc-auth.php?login=' + encodeURIComponent(item.username) + '" class="login_as btn btn-xs ' + btnSize + ' btn-primary" target="_blank"><i class="bi bi-envelope-fill"></i> Roundcube</a>';

Edit data/web/mailbox.php and add this line to array $template_data:

  'allow_admin_email_login_roundcube' => (preg_match("/^(yes|y)+$/i", $_ENV["ALLOW_ADMIN_EMAIL_LOGIN_ROUNDCUBE"])) ? 'true' : 'false',

Edit data/web/templates/mailbox.twig and add this code to the bottom of the javascript section:

  var ALLOW_ADMIN_EMAIL_LOGIN_ROUNDCUBE = {{ allow_admin_email_login_roundcube }};

Copy the contents of the following files from this Snippet:

  • data/web/inc/lib/RoundcubeAutoLogin.php
  • data/web/rc-auth.php

Finally, restart mailcow

docker compose down
docker compose up -d

Last update: 2022-10-03 22:13:17