LCDUNG.

server {
	server_name mail.example.com;

	access_log   /var/log/nginx/mail.example.com.access.log;
	error_log    /var/log/nginx/mail.example.com.error.log;

	root /usr/share/roundcube;
	index index.php;

	location / {
		try_files $uri $uri/ /index.php?$args;
	}

	location ~ \.php$ {
		try_files $uri =404;
		include fastcgi_params;
		fastcgi_pass 127.0.0.1:9000;
	}

}