Webmail icewarp

I have tried everything, but I cannot secure my icewarp webmail. Is there a specific procedure?

Icewarp mail server vers: 10.2.2
My domain is: bitcompany.eu ( webmail.bitcompany.eu )
The operating system my web server runs on is (include version): Windows 2019

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site no

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