Thank you Till for your reply
I want to install RoundCube on the mail server because:
- MySQL and PHP it's already installed for ISPconfig, so I need only Apache2
- Working over the lan between RoundCube (if installed on the WEB server) and Dovecot or Courier (installed on the MAIL server) slows net and both server, especially if many users move large quantity of emails (IMAP protocol)
- because so RoundCube work in localhost and don't generate any traffic
- last because I want that Roundcube site respond on the entire IP of mailserver, for example:
For install Apache2, I need only to run
apt-get install apache2
or Roundcube need more dependencies and other configuration of the system?
Another question: it's better Dovecot or Courier?