There are, however, three very big problems. First, it forces people to
pay for services that they don't pay for today.
Businesses often pay, not for services, but for accountability. They want someone else to take responsibility for a problem even if it costs them more money than taking that responsibility on themselves. Insurance, maintenance contracts, etc. Today, if Joe Business gets lots of spam, it is not his ISP's responsibility. He has no-one to take responsibility for this problem off his hands. But if he only accepts incoming email through an operator who is part of the email peering network, he knows that somewhere there is someone who will take responsibility for the problem. That is something that businesses will pay for. But first, ISPs have to put their hands up and take collective responsibility for Internet email as a service that has value and not just as some kind of loss leader for Internet access services. --Michael Dillon