Johannes Pieper that's a good question. Out of curiosity, where did you hear that it's illegal to send out direct mail in those states? Was this an authoritative source, or just a "word on the street" kind of thing that someone mentioned in passing?
And also, what kind of direct mail are we talking about? The term "direct mail" is a VERY broad term that applies to pretty much any kind of message sent out in bulk... which could be coming from a charity, or a credit card company, or a political campaign, or the government itself, so before we jump to the conclusion that all direct mail is illegal, it would help to know (if that's even true), what exactly makes it illegal?
I know you don't have these answers. I just mention these things because they're probably worth thinking about while we try to find the facts.