[cheald]

> They'll almost certainly still be able to block open mail relays

On what grounds? Open mail relays certainly get abused, but there's nothing inherently illegal about them or the traffic they serve.

[wtallis]

I expect an explicit allowance for this, because that's the easy way out and there really isn't the political will for anything else.

[TheSisb2]

Increase spam in general by misconfigured mail servers getting hacked and IPs getting blacklisted.