NNTR – No Need to Respond generally means “dont bother reading this email, delete immediately”. It is impossible to get people to read critical notices that do need peoples attention in other divisions where I work. Half the company has a culture of “never save emails” and the other half is “save everything, that is proof you said something”, and is hilarious when the side that doesn’t keep things pretends like they never got an email or responded to it. They expect you don’t keep emails either and then BAM! Paper trail bitch, and their eyes go wide like “why would you keep that?!?!!?”