get the software:

http://roundcube.net/download/

prepaire a Debian-7:

apt-get install  apache2 libapache2-mod-php5  libapache2-mod-perl2 php5-gd php5-mysql libapache2-mod-php5 php-pear php5-intl php5-mcrypt php5-sqlite

Extra packages:

aspell aspell-en dbconfig-common javascript-common libaspell15 libdbd-mysql-perl libdbi-perl libjs-jquery libjs-jquery-ui libnet-daemon-perl libplrpc-perl
mysql-client mysql-client-5.5 php-auth php-auth-sasl php-mail-mime php-mail-mimedecode php-mdb2 php-mdb2-driver-mysql php-net-smtp php-net-socket php5
php5-pspell  tinymce wwwconfig-common

Suggested-packages:

aspell-doc spellutils libjs-jquery-ui-docs libterm-readkey-perl php-log php-soap php-crypt-gpg roundcube-plugins mysql-server postgresql-client

Go to:

https://webserver.example.com/roundcube/installer/

get the plugin:

https://github.com/JohnDoh/Roundcube-Plugin-SieveRules-Managesieve/releases

Unpack the package, and rename it to sieverules and place this directory in the plugin-directory.

Add sieverules to $rcmail_config['plugins'] in your Roundcube config.

Rename plugins/sieverules/config.inc.php.dist to plugins/sieverules/config.inc.php

In this config-file:

• Set $rcmail_config['sieverules_host'] =
• Set $rcmail_config['sieverules_port'] =
• Set $rcmail_config['sieverules_usetls'] = TRUE;

• (Optional) Set the folder delimiter (if your managesieve implementation uses a different one to your IMAP server
• Set the name of the ruleset in which your sieve rules are stored
• Enable/disable the actions you want
• (Optional) Define any predefined rules you wish to use
• (Optional) Define a default sieve rule file
• (Optional) Define an example sieve rule file