I have an existing Roundcube mail system that I want to turn into a strictly mail system, and have another host be the Roundcube webmail interface. I've got the new host pointing to the old one successfully, and I copied over the MySQL roundcube database (both versions of Roundcube are the same).

I've run into two issues:

1. The mail_host column in the users table was "localhost", but now

wants to be the IP address of the mail server. Ok, I can update all those, no problem, so I think this is solved.

2. A user can log in as username & password, or username@domain.com &

password. However, these create unique users in the users table, and thus have independent settings.

How do I make Roundcube treat username and username@domain.com the same? There is only one domain that is handled by this system. I have: $config['mail_domain'] = 'domain.com';

Is there something else I need to modify?

I think you have to chose 1 format store in the backend username and then on the frontend remove the domain from the login. (and maybe update the mysql table and remove the domain there as well, so users keep their settings)