> Because it raises some very "interesting" issues about just > which server a particular client should be bound to. The > network-nearest available one or the one associated with the > same organization as the client are typical possibilities > (along with the somewhat vague "email address") and, if the > wrong one is chosen, it may be inaccessible. The user still needs to specify their email address. I get my IP service from comcast but I do not use their mail service. This is why I do not see DHCP as a mechanism. If I have pbaker@xxxxxxxxxxxx there is only going to be one set of servers for incomming mail for that address, the place for POP3 and IMAP4 services is obvious. Traditionally it was possible to choose the outgoing mail service. That option is effectively closing due to spam control measures. But even if the email service has a choice of outboud email relay it is a limited choice and this does not affect the means used to advertise each relay. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf