There are STILL a number of mailers out there that use the RFC822 "To:" info to decide where to deliver the messages. So here is what happens: 1. Joe posts to list. 2. LISTSERV forwards to moderator. 3. Moderator approves and forwards back to list. 4. LISTSERV distributes happily. 5. Broken mailer gets message, sees "To:" line, and delivers back to list. 6. LISTSERV forwards to moderator. It can be difficult to identify the failing addresses, but at any rate the message should not be distributed a second time. Eric