Now you're looking for someone who is spamblocking IN TRANSIT (ie: not to or from an end customer).
How would THAT come about, pray tell? Do you know how modern SMTP based email actually *works*?
The rest of your argument notwithstanding, it could come about if you block certain CIDR blocks at your borders based on repeated and/or unresolved spam activity from a given source. I.e, blocking *all* ip traffic for a given block at your borders, then transiting customers, who may be transiting other customers, etc. lends credence to that theory. I can't comment on the (il)legality of such, though I'd fight any court which challenged my right to filter, even arbitrarily, at my own borders. None of my service contracts guarantee universal connectivity. Cheers, Brian -- Brian Wallingford Network Operations Manager Meganet Communications, TCIx, Inc.