Hello! I have spent long time trying to find solution for me. I'm using newest ISPConfig 126.96.36.199 on CentOS 6.4 x86_64. I have newest Roundcube installed (0.9.2) and newest plugin from github. Earlier i had older version but i updated everything. It looks roundcube by itself working great, without any problems. But the plugins i think not. If i will put inside /ispconfig3_account/config/config.inc.php line: $rcmail_config['soap_url'] = 'http://localhost:9090/remote/'; or $rcmail_config['soap_url'] = 'http://my.server.dns:9090/remote/'; Then Roundcube loads, but on the special ispconfig 3 plugins there is Soap error. If i change it into: $rcmail_config['soap_url'] = 'https://localhost:9090/remote/'; or $rcmail_config['soap_url'] = 'https://my.server.dns:9090/remote/'; Then it cannot login at all saying "unknown server name" at login screen after click on login button. Here is Apache log on the second settings (when i can't login): The error log is empty. I'm using webmail2 because i left squirremail, and i also use 9090 port instead of 8080. Please help anyone.