You can edit your webmail password from the random character password provided to you at the time of set-up.
Step 1
Login to your webmail account. https://mail.b.hostedemail.com/ If you need assistance consult the tutorial How to Access Webmail.

Step 2
Select the "Settings" tab from the top navigation. It will open the Settings>Mail page.

Step 3
Select the "Password" tab.

Step 4
Select Change Password

Step 5
Enter your current email password in the Current Password field, enter your new email password in the New Password and New Password (again) fields, and click "Save". Now you will need to update your password across all of your devices that this email account is set up on.