Please find below the steps to take to change your email password:
From within your website dashboard navigate to Email Accounts near the bottom left and click it
You will now be on the Emails page which will look similar to below:
Click on the radio button next to the email address and then click the Edit button (or the Edit link to the far right of the associated email address)
On the next page enter a new password and then confirm the new password.
*Please note that the password will need to have at least one capital letter, lower case letters and two numbers.