spumoni_fettuccini's Journal: New way to spam? Impossible to stop?

This is the first time I've seen this and I think we're hosed. We [among many others] received a spam for a conference. In the "To:" line was the spammer, in the "Bcc:" line was the spammees. Anyone who replied back resent the spam to everyone on the list. In the space of an hour we received 40 of these things from people wanting to be removed from the list and out of office replies back to the spammer. Seems they are using a list server and anytime there is a reply it goes to the list as well as the sender. As this can defeat white/blacklists and [I'm pretty sure] anti-spam software, is there any way to kill this? Blocking the sender domain would work for the original, but it is not feasible to block coworker, industry contacts, customers, etc. I don't believe trying to get people not to reply to it will really work either, at least not for a while. We inform our users not to reply to a spam and they are pretty good about it. Lastly, before you all hammer me, do you really think that if the spammers don't know about it yet posting it on /. is really going to delay them from learning about it?

I was thinking about submitting this as an ask slashdot, but I wasn't sure if I'm missing something simple/stupid and I didn't want to make an ass of myself if it actually was posted.

My suggestion...

[JohnGrahamCumming]

Go ahead and post this anywhere you like. Spammers are spending their time thinking up new ways to get their spam out and I doubt that you'll be causing a big spam problem by talking about something that's already out there.

It's better to talk openly about what you've seen so that others can learn from it than keep it a secret because you fear that others will use it against people.

John.