You and the receiver are in a business relationship. AT&T, through its “arbitrary” blocklist, is getting in the way. Without further justifications (and “oh it’

You and the receiver are in a business relationship. AT&T, through its “arbitrary” blocklist, is getting in the way. Without further justifications (and “oh it’s the algorithm” is not enough!) they are interfering with your business relationship. That’s what tortuous interference is, getting in the way of third parties doing business. You could argue about technical details around the server but a judge will properly understand the social constructs at play.