Pete C. wrote:

Greetings,
I recommend that RoundCube automatically assign a new default 'identity' for new users based upon the login username and the mail_domain from the config.  Our users are either wondering why they can't send email or setting their identity information incorrectly quite often; this could become cumbersome for Technical Support.
Thanks,
-PC

Isn't, by default, you can change the mail domain in the main.inc.php config file:
// This domain will be used to form e-mail addresses of new users
// Specify an array with 'host' => 'domain' values to support multiple hosts
$rcmail_config['mail_domain'] = 'whatyouwanttheirdomaintolooklike.com';

At the bottom of that page you have the other settings, just not the persons full name is all.