It is very important that you use a hard to guess password and do not share it with anyone else. If someone is able to guess your password they can access all of your email, use it to send spam, or worse.
- Login to your client area
- From the menu bar go to Services->My Services
- Select the account with your email address that you want to update (if you have multiple accounts)
- Scroll down to the modules under 'Manage Account' and select 'Email Accounts'
- At the bottom of the next page you will see all of your email accounts. Click the lock icon to update your password
If you forget how to set up your email accounts this article explains how with the free SSL option as mentioned above.