Richard, I applaud you for taking the time to explain "your" side of the "Potential Spam" pipe. I get so much spam that if I don't log on for two to three days, my ISP space allotment is filled and folks from whom I want to get email get rejection messages.  My ISP gives me the option of eliminating "Potential Spam" at the server right away, or tag it (Notify) when it is delivered to my client PC.  Unfortunately they sometimes tag valid email so I have to elect the Notify option and it stays on the server and uses up my allotment until I download it.  I wish you or someone you know would come up with a way, from the client, to tag email as spam and have that system deliver back to the spammer the kind of message that identifies my address as invalid, in an effort to remove it from spam lists (no, I don't smoke, let alone weed).