I agree with Juha. We are seeing more and more spam hitting the mail servers that is being relayed via open socks proxies. At this rate, I think its just going to be a matter of time before we're forced to block inbound connections on proxy ports. I've had good results with the Osirusoft RBL's - Joe combines the more commonly used ones. Be aware that you may need to whitelist some regions - keep any eye on your rejections. Spamcop seems to be fairly conservative in its listings. I'd disagree with Mike Beattie's comments - the rant on the link posted is just that, a misguided rant. I'm sure we're all aware of the additional workload created by UCE. Unfortunately, it would seem that at least one ISP (that of Mr. Felton) failed to perform due diligence. Gordon