The State of Texas has banned all forum, social media, and email content blocking or filtering unless it contains a direct threat of violence toward a specific individual.
It's almost certainly unconstitutional, and like a similar Florida law will be blocked by a court, but yet another thing to dislike Texas for.
It specifically labels social media and all other internet communication providers as "common carriers" - not clear in the story whether that results in Railroad Commission jurisdiction (probably not, but a nice theoretical railroad connection.
If Texas wants to see what the result of the policies they're demanding looks like, they might want to take a look at Altamont.
Spam fiiltering? It also blocks email providers from blocking any communications. Period. Including spam.
It attempts to apply to all providers, whether or not operating in Texas. Of course, since AT&T is headquartered in Texas, they're obviously covered.