Our personal e-mail address has notning to do with a PM sent thru Agora to another registered user, other than Agora can notify the receiver of a PM that they have one from "Mr X." This notification can be stopped, by unchecking the e-mail notification box under ones profile at the bottom, which I did months ago as it was annoying when the volume was high. I now depend on the PM message box and nothing else when receiving any.
If there is a way to block receiving PM's I've never heard of it?