Mark is the Admin for the Tigers list, I am it for the Alpines list.
Most of the bounces come back to me, but sometimes they go back to the original sender of the message. That is because some mail sites apparently don't honor the "Sender: owner-alpines(at)autox.team.net" header that is added to each message that goes out to the list.
I am working to trace the source of the bounces and will remove the bad address(es) once found. Apologies for the inconvenience.
-- T.J. Higgins tjhiggin(at)ingr.com Huntsville, AL