Hi!
I try to use roundcube, but I found a little bug. If the username contain not only ASCII characters (from or to) it's not work correctily. The Mail mime version is buggy because it's created the From/To address like this: =?UTF-8?Q?.....xxx@yyy.zz?= Because it's incorrect. The mail end with >, and ?= is a new mail user name. So it's generate incorrect From/To header. I changed the mail mime class to the last released (tested with: v1.3.1 and the CVS version), and it's work correctily....
Cow