How do I block the domain of a junk email?

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1

I receive junk email from this email address: admin-z84@hjdksahdkjhaksj.smashbeta.com.

Blocking the email address is not effective since the sender of the junk uses a large number of email address having the same domain name.  How can I block the domain name of this particular email address?

2

if you go into your email junk settings ( block) and put the @hfhfhhdh part .com

copy and paste the email address from the @

that should block any emails from that sender(s) email domain

been sometime since i done this but i believe hotmail, yahoo can do this in

spam,phising, and other scam emails will use a domain but change the start of it ( name part)