Hi there! When switching our servers to ISPConfig we had the problem that we already had a roundcube installations up & running and we wanted to keep the roundcube-plugin sieverules because it allows the user to edit his filter-settings from within the webmailer in a quite comfortable manner. With the help of the sieverules-plugin-developer (roundcube-team) we wrote a plugin which utilizes the api-functions of ispconfig to establish the communication between roundcube and ISPConfig. Because it was quite a hard struggle we don't want that anybody else has to fight this again. Basically from the repo-version of the sieverules-plugin for roundcube 0.6beta onwards a hook was implemented by John_Doe which is utilized by the plugin (we managed to get it also run with rouncube 0.5 stable). ISP-sieverules contacts to ispconfig via the api-interfaces and makes a mail_user update. The sieve-script is written into the custom-rules field in the ispconfig mail_user table and then implemented into the sieve-file. Requirements: Dovecot (with sieve plugin) Roundcube 0.6beta (also possible with Roundcube 0.5 stable) Sieverules-Plugin (current repo-version contains the hook) Installation-Instruction: - Download the plugin unzip and put in your roundcube-plugin directory (add the plugin in your main-config file) - Create a remote user for ISPConfig in the Adminstration-Panel - Recommended: Create a database-user for the ispdatabase which may only use the SELECT statement - configure the plugin via the config.inc.php (contained in the zip-file) Have fun!