new email account via roundcube

Hi,
how can set my server for anyone from internet to be able to create an email account on my domain, without my help?
(user registration via roundcube)
but can allow to change password from roundcube webmail ?

Thanks!

for password you need to setup plugin for it located in /roundcube/plugins

Thanks
for change password, I will try this plugin
http://wiki.centos-webpanel.com/roundcube-password-change-plugin

but how can I do that people to set their own email addresses without me?

Thanks
for change password, I will try this plugin
http://wiki.centos-webpanel.com/roundcube-password-change-plugin

but how can I do that people to set their own email addresses without me?

you can give access to cwp user panel

there is no option by which  users can create their own email accounts without my intervention?
url for create new / sign up from roundcube interface or other web page ?

Thanks