How can I login to my email admin account (Postmaster email account) from my hosting control panel

Control Panel V3 > Hostings > Emails
There are two ways for you to login to your postmaster email account automatically from your hosting control panel without filling the email address and password on http://mail.domain.com page.

Please follow the steps below to login to your postmaster email account for your email accounts management.

The first way

1. Login to your hosting control panel

2. Click on 'Emails' 
 
3. Click the Manage Users & Quotas under the actions option. 
 
4. Click 'Advance Functions'
5. On that page, click 'Go Login' button to login to your postmaster email account:
 
The second way

After the step 2 as the above says, when you login to the email manager page, you can simply click the "Login Webmail Interface" icon under the actions option to login to your postmaster email account directly.