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: