If you have an immediate need for password changing via the web, I've used this suid CGI successfully:

http://www.redhat.com/archives/pam-list/2000-January/msg00059.html

Note that you'll have to create a new "webpasswd" service in your pam configuration directory.

Not an optimal long-term solution, though.  See the WARNING WARNING WARNING block in the header comments.  You'll probably want to rename it, put it at some obscure URL and not publicly link to it as a precaution.

-j

On Thu, 2005-12-08 at 14:09 +0200, Kari Päivärinta wrote:
Could it be possible to build a change password feature to the
RoundCube? I have users who don't have (or never will have) shell
access so this is the single most important feature needed to
change my RounCube to my primary webmail.

-- 
Jeremy Jongsma
jeremy@jongsma.org
http://jongsma.org