Can you point to a mark that you think was genercized in a similar fashion to what you project happening if Postman does not pursue legal action against Postwoman?
So the trademark was protected it would appear. Even though the infringing company makes a good case (laches) for selling said products without regard from the fraternities/sororities for decades (in fact, they were selling to these organizations, so they were generally aware of the company's existence and practices).
https://www.eff.org/deeplinks/2013/11/trademark-law-does-not...
>>>Quite simply, the view that a trademark holder must trawl the internet and respond to every unauthorized use (or even every infringing use) is a myth. It’s great for lawyers, but irritating and expensive for everyone else. And when done clumsily or maliciously, it chills free expression.