Jim
  What I was suggesting is that anyone can search for and join lists
as" joeydoe@gmail" etc, receive the emails, harvest the addresses and
send a bulk spam email to the harvested list.   I am on digest and
received the iberparts spam directly.

  I'm not saying the list is responsible, just vulnerable.
  Cheers
  Don

At 7:35 MDT I  received another copy, this time from ibexparts (as
opposed to iberparts on the previous), addressed to      john<
jgo@ASERTY.COM