Eric, you might wish to propose off list that you will treat as usenet traffic any mail containing the string on a line by itself: this document is usenet traffic and should be processed as such Then it is up to the usenet folks whether they want to insert that at the gateway. And up to them to propose what it should mean in various contexts. Not that you would necessarily implement that, but at least the discussion about how you know something is Usenet traffic would be over. Peace and best wishes. Dave Dave Gomberg, role model for those who don't ask much in their fantasy lives. GOMBERG@UCSFVM Internet node UCSFVM.UCSF.EDU fax-> (415)731-7797