>How about something much simpler? We already are aware of bandwidth caps at >service providers, there could just as >well be email caps. How hard would it be to ask your customer how many emails >we should expect them to send in a day?
Once again, I encourage my competitors to follow your advice. R's, John PS: There are plenty of giant botnets that only send a trickle of mail from each infected host, but the aggregate amount is enormous.