How do I blacklist a domain name?
I want to black list some domains in Spam Assassin. Do I just use a wildcard (*) symbol followed by the domain name?:
Please log into the Account Manager and click on SpamAssassin to configure your black list settings. You can black list an individual email address by adding the address in the email@example.com format, or you can black list an entire domain name by adding *@example.com.