What do people today think of the SMTP RFC's current requirement that mail programs and servers must not under any circumstances change or delete Received: headers? Is exposing sender IP addresses to any attacker who can view e-mail headers, for the purposes of preserving trace information, really worth it when weighed against considerations like security and privacy? http://tools.ietf.org/html/rfc5321#section-4.4 Kevin @ageis 0x5921D69C