There are two situations that we have to consider.
1) you DO know your old email password.
2) you forgot your old email password.
https://cp.helpinghost.net:2096
Once logged in, click on the “Webmail Home” button:
On the page that appears, click on Password and Security:
Have your tech administrator login to the hosting control panel and set the password for you.
Once logged into the hosting control panel, click on E-Mail Accounts.
From there, click Manage next to the email address you are working on: