At 12:54 02/02/2004 Monday, Ahern, Shannon wrote: >I know that the spam-generating viruses going around can fake mail from >any accounts, so when I see that stuff, I know it isn't real. But how on >earth can anything make my listserv ping or probe a non-subscribed >account and then send me a report of the results? I am baffled. This >person is not a subscriber - how can they be monitored? > >Here's one of the reports: > 1 01/30 01/30 [log in to unmask] > Last error: SMTP; 550 5.1.1 unknown or illegal alias: > [log in to unmask] something generated a "bounce" report perhaps sending to a bogus to: that made it appear that it came from the owner-listname. QED I have a bunch of bounces from FIRSTNAME@SOME_ISP that aren't subscribed. Now if you start to see bounce counts for most distributions from an address, then that is worth pursuing as a subscriber system which is redirecting or rewriting. /Pete