We are missing a feature with ISPconfig3, so that individual e-mail account holders can log in using their e-mail address and their IMAP password and can change their password or set the holiday message. The way it is now (through a client administrator) is not secure nor user friendly.
You know that there is a mailuser interface for roundcube? http://www.howtoforge.com/forums/showthread.php?t=38437
Does Roundcube also allow to change password? Ok, seems to be the only solution, I found this summary for installation: http://www.howtoforge.com/forums/showpost.php?p=213239&postcount=20 Does it also allow to change the password? Or could this be done with Sieve? Our users already have a mail interface through Group-Office (which connects to ISPconfig mail users through IMAPauth and could be extended with Sieve Control).
Nutmail I would find the feature for mailusers to be very needed. I am using Nutsmail and cannot seem to find any working solution. So it is not just for Roundcube a interface could be helpful.