I use the latest version of roundcube as my webmail, and I want to allow webmail access to free.fr and gmx.it (I have accounts with these two email providers).So set the following in rc's configuration file.

$config['imap_host'] = array('ssl://imap.gmx.com:993','ssl://imap.free.fr:993');

$config['smtp_host'] = array('imap.gmx.com' => 'ssl://mail.gmx.com:465', 'imap.free.fr' => 'ssl://smtp.free.fr:465' );

$config['mail_domain'] = array( 'imap.gmx.com' => 'gmx.it', 'imap.free.fr' => 'free.fr' );

When I open webmail, it always displays a dropdown menu for me to select an IMAP host. This is so frustrating. How to disable this drop-down menu and automatically match email addresses to imap hosts?

I guess the info in the "Re: smtp servers" thread will help you further.