Racegridfighter spam

Recently, I have received about 20 of the old “Crack the egg for a prize” spam/phishing emails that I thought had been eradicated by Cox email filters.  Lately, they have been back just as bad as before.  I have figured out they all come from addresses with a racegridfighter.com domain.  PLEASE BLOCK THIS DOMAIN AS IT NOTHING BUT NUISANCE AND IT CLOGS UP MY INBOX.  I have now created a filter, but still, it’s a royal pain.