[RCU] Domain choosing in roundcube

Hi,

I have a mail server which serves multiple domains, and want to be able to login using only the first part of the address (for example, nicolas@foo.org is able to login as nicolas), even if there is multiple accounts with same first part (for example, nicolas@foo.com and nicolas@foo.org), using a dropdown list of possible domains (here @foo.org and @foo.com), in a defined order (for the most commonly used to be default and not bother users having to choose too often)

Is this possible and how?

Thanks a lot for your help. Have a nice day.

Nicolas Derive.