How to add a domain and all sub-domains into the Blacklist

Hi everyone,

I have an issue with Blacklist; I try to block a domain and all sub-domain but with no results. What I do:

1) in blacklist I add the domain: Example: domain.com - I will put the real domain here - but the mails still arrive with no problems.
2) I try to add a second domain with *.domain.com but the PMG return error: Error: Invalid Domain Data. In Blacklist I have similar rules and work. These domains was added long time ago.

What I should do to create the correct rule? I don't want to block the entire IP class.

Thank you for help!

My PMG version is: