It works for me "Server Wide" if entered in the main Server wide blacklist but if it is entered into individual domains then it doesn't work.
So basically it looks like you can block them Server wide if you have admin rights but not on a domain by domain basis. I think the issue is more...
This control panel has become a total nightmare and joke with Windows 2008 R2. It has been nothing but problems since upgrading from an older 9.5 Plesk VPS running on Windows 2003. Not one thing has worked correctly from the DNS to this great new license problem with Kaspersky anti virus which...