Login to Roundcube Mail using email address

[klaus++]

Hello,
is ist possible to tweak Roundcude to accept ISPConfig mail addresse as login id ?
I found an interesting link on this page:
http://trac.roundcube.net/wiki/Plugin_Repository

"Confixx authentication plugin - Login with mail addresses to RoundCube. Resolves Confixx mail adresses to real username." It links to
http://www.needful.de/en/opensource/roundcube.html

Thank you for your hints,
klaus++

[falko]

Should be possible. We are doing the same in ISPConfig's Uebimiau package.