The point of NN is that the ISP shouldn't get to make that decision. Even "allow on request" is very problematic because it's a slippery slope. Many people run

The point of NN is that the ISP shouldn't get to make that decision. Even "allow on request" is very problematic because it's a slippery slope. Many people run SMTP at home mostly to receive mail, because the ISP is legally obligated to retain mail logs for law enforcement etc. (EU data retention law)