Some (but not all) of my lists exhibit the following behaviour: mail sent to list, list includes some people on one of our Unix boxes, some of those people have a "standard" (I'm told) vacation program running, and, depending on how the list is defined, either the sender or the entire list is notified that the person is on vacation. The vacation program (I'm told) scans ALL To: and CC: tags (including X-To: and X-CC:) and notifies everyone. I have experimented with using "X-tags= No" in the list header which helps but . . . Has someone else come up with a solution or workaround to this using list headers? Does anyone have experience with configuring VACATION so that it recognizes list traffic and does not generate the message? Thanks in advance.