If you type this in the CC-input field: "Your Name (your@email.com)" your@email.com you will endup with a bounce.

It seems roundcube is seeing the values between the " as an emailadress.

Reprodruce this error:

Typ in the CC-field: "Your Name (your@email1.com)" your@email2.com

And you'll get an error about email1.com

P.S. I tried to put this in the TRAC-system, but couldn't create a login.

Best regards, Pascal Nobus -- www.webservice.be