XF 1.2 Banning Email Domain Ending In "beardedcollie.pl"


Well-known member
I'm noticing that the xenForo spam catcher is catching a lot of registrations from email domain: @cc.beardedcollie.pl . The 'cc' part is variable, but beardedcollie.pl is common to all the blocked domains. I'd like to prevent anyone who's <beardedcollie.pl> in their email ID.

How do I do that?