How can an email user in ISPConfig 3 change his password?

To allow email users in ISPConfig 3 that do not have a client login to change their password, you can use one of these webmail plugins: Plugin for roundcube: http://www.howtoforge.com/forums/showthread.php?t=37077 Plugin for Squirrelmail: http://www.howtoforge.com/forums/showthread.php?t=35297 Tutorial about installing the squirrelmail plugin: http://www.howtoforge.com/how-to-configure-squirrelmail-to-allow-users-to-change-their-email-passwords-on-an-ispconfig-3-server