1.1.) Sign in to your Register Domain profile at the below link:
My Account - Services
1.2.) Select "Control Panel"
1.3.) Locate the email section, and select "Email Accounts"
1.4.) Locate the email address in question and select "Manage"
1.5.) Enter a new password
Under the "Security" section select "New Password"
(Note: Do not click "Generate" as this will give you an automated password)
1.6.) Updating the Password
Scroll to the bottom of the page and select "Update Email Settings"
1.7.) All done!
Your password has been successfully updated server-side and can now be changed on your local mail application.