It's not a bug, it's just that the origin isn't POSTMASTER@nodeid, it's undetermined (typical cause: MAILER bug causing it to omit the whole header, with only the first 'Received:' line being sent). Seeing that the origin is undetermined, LISTSERV puts POSTMASTER in the outgoing 'From:' field, because you've got to have a 'From:' field with something valid in it. Eric