You can now change your email password yourself. To do so, you can use the new email self service platform. Log in with your existing email account and password. Then, once logged in, select the Password section on the left hand side. You can then enter your existing password, followed by your new password (twice). Select Save and the new password will take effect immediately.
PLEASE NOTE: Changing your password will update the password for all email clients, so you will need to enter the new set password on any other machines where your email account is configured.