You can change your password by using the URL below.
Just change [YOUR DOMAINNAME HERE] to your own domainname:

https://[YOUR DOMAINNAME HERE]:2222/CMD_CHANGE_EMAIL_PASSWORD

In case you are using Firefox and you get the message of a security problem with the certificate, please click on OK and 'add exception' in the subsequent windows. There is nothing to worry about, the security settings of your browser might just need a bit of adjustment. Once you have added the security certificate for the particular URL, it will be stored on your computer.