Step-1
At first, type your domain name then slash and cpanel as see the bellow image
OR
http://yourdomain.com:2082
Step-2
Then put user name and password
Step-3
Click on “No, I’m fine. Thanks”.
Step-4
Click on “email account” as shown bellow
Step-5
You can change password and also delete account.
You can also read – Transfer all email accounts from one windows server to another for Plesk panel