How do I block all ".icu" domain emails

The new ".icu" domain has opened up a disastrous spam/spoof/fishing email deluge. I am (and probably many others are) getting dozens (and dozens) of sales pitch emails from mis-named email addresses on the .icu domain. There ought to be a way in the Apple Mail program to block (mark as "Junk") all emails from this domain (rather than do them one at a time). Is there? How do I do it? If not, is Apple developing an update allowing the blocking of emails by domain?

Gary