Here's a good one. A user correctly forwarded a confirmation back to listserv, but his mail program put the original sender in the From: field so listserv rejected it as being from itself. To: [log in to unmask] From: LISTSERV at SAS Institute (1.7f) <[log in to unmask]> (by way of [log in to unmask]) X-Sender: [log in to unmask] Subject: Renewal of your subscription to list TSNEWS-L