How can you do that? They keep changing addresses and domains etc, and they spoof the address. So you might block Joe today, but tomorrow Joe will send you new spam using a different email.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi