Who uses roundcube webmail?

Hi folks,

I have installed roundcubemail 1.0.2 on an openSUSE-12.3 server with postfix, dovecot and postfixadmin.
Mailbox administration is done with postfixadmin, storing usernames and passwords in the mailbox table of postfixdb.
postfixadmin uses '/usr/bin/doveadm pw' and 'dovecot:PLAIN-MD5' for encryption.

I can access a mail account with thunderbird/imap.

My issue is that I cannot login with roundcubemail, getting the error the imap error log:
[


My questions:
- how do I configure roundcubemail so that it uses postfixdb to access user and password?
- can anyone provide a config example on how roundcubemail uses postfixdb to access user/password?






Thanks for hints