[Q] Block incoming spam texts from email topic

I've recently been getting a lot of spam text messages coming from a (probably spoofed) domain called @facebookmail.com. I'm unable to block these messages due to the fact that they're from email addresses and not phone numbers.

I've tried several Play Store apps to block spam, but they all require me to change my default text messaging app, which is.. Less than desirable.

Could I get some help here? This is driving me insane!
(US Cellular Galaxy Note 4)