Who I have the same questioned this topic

I went to "Internet Spam Blocks" to block messages from @vzwpix.com, but it gave me an error saying "Please check the format and try again; vzwpix.com not permitted." I already blocked their number under "Call and Message Blocking" but they can still send me messages using @vzwpix.com. Is there any other way to block someone from texting from @vzwpix.com?? Help me