1. Log into the Client Management Portal (https://smallbusiness.host/clients/clientarea.php).
2. Click Services 
   
3. Select the Plesk hosting service you wish to manage
   
4. Click Manage Domains to log into the Plesk Control Panel 
   
   
   
   
5. Click Mail on the lefthand sidebar
   
6. Click on the email address you need to change the password for
   
7. Type the password you want to use into both text boxes in the password section, and click OK,
   Tip: If you want to be more secure, click the Generate button instead, and then click the Show button to the right to display the randomly generated password.