Blocking of Incoming Domain Restriction by wildcard

Blocking of Incoming Domain Restriction by wildcard

Hello,

If a spammer from the domain abc.com sends spam from different subdomains of abc.com, I should be able to block that entire domain and not have to block each by subdomain.

For example, blocking domain abc.com does not block viagra.abc.com or pills.abc.com.  I have to enter each one individually.

Therefore, either entering abc.com as a blocked domain should block everything including subdomains, or I should have the option of entering *.abc.com.  However, entering *.abc.com throws the error, "Enter valid domain".

Thank you.  You guys are great!

Mark